A tourist collects plastic items washed up by the sea at the Ao Phrao Beach, on the island of Ko Samet, Thailand June 9, 2018. REUTERS/Jorge Silva

A tourist collects plastic items washed up by the sea at the Ao Phrao Beach, on the island of Ko Samet, Thailand June 9, 2018. REUTERS/Jorge Silva

A tourist collects plastic items washed up by the sea at the Ao Phrao Beach, on the island of Ko Samet, Thailand June 9, 2018. REUTERS/Jorge Silva

Tourists stand in front of huts that form part of the Lady Elliot Island Eco Resort where a turtle digs for food amongst the coral in the island's lagoon, north-east of the town of Bundaberg in Queensland, Australia, June 9, 2015. REUTERS/David Gray/File photo

A tourist boat passes on a canal in Amsterdam, December 6, 2013. After seven years of no real growth, the Netherlands is finally poised to outperform the euro zone's lackluster economy, with rebounding home prices driving a broadly-based consumer spending revival. Picture taken on December 6, 2013. REUTERS/Michael Kooren

Tourists take a "selfie" in front of the Arch of Constantine in Rome July 12, 2015. Dirty and disorganised, Rome is once more in decline. City hall is paralysed by allegations of Mafia infiltration, its basic services are in tatters, the main airport is partially closed, and wild cat strikes have frayed an already ropey public transport network. For generations, the Italian capital has rested on past glories rather than built on them. The years of neglect, corruption and bureaucratic bungling have taken a fierce toll, reflecting a wider malaise that afflicts Italy as a whole. Picture taken July 12, 2015. REUTERS/Tony Gentile

Tourists watch a sunset on a beach next to the Lady Elliot Island Eco Resort located 80 kilometers north-east from the town of Bundaberg in Queensland, Australia, June 10, 2015. UNESCO World Heritage delegates recently snorkeled on Australia's Great Barrier Reef, thousands of coral reefs, which stretch over 2,000 km off the northeast coast. Surrounded by manta rays, dolphins and reef sharks, their mission was to check the health of the world's largest living ecosystem, which brings in billions of dollars a year in tourism. Some coral has been badly damaged and animal species, including dugong and large green turtles, are threatened. UNESCO will say on Wednesday whether it will place the reef on a list of endangered World Heritage sites, a move the Australian government wants to avoid at all costs, having lobbied hard overseas. Earlier this year, UNESCO said the reef's outlook was "poor". Picture taken June 10, 2015. REUTERS/David Gray

A tourist sits atop a pile of reef shells and dried coral as he watches a sunset on a beach next to the Lady Elliot Island Eco Resort located 80 kilometers north-east from the town of Bundaberg in Queensland, Australia, June 10, 2015. UNESCO World Heritage delegates recently snorkeled on Australia's Great Barrier Reef, thousands of coral reefs, which stretch over 2,000 km off the northeast coast. Surrounded by manta rays, dolphins and reef sharks, their mission was to check the health of the world's largest living ecosystem, which brings in billions of dollars a year in tourism. Some coral has been badly damaged and animal species, including dugong and large green turtles, are threatened. UNESCO will say on Wednesday whether it will place the reef on a list of endangered World Heritage sites, a move the Australian government wants to avoid at all costs, having lobbied hard overseas. Earlier this year, UNESCO said the reef's outlook was "poor". Picture taken June 10, 2015. REUTERS/David Gray

Tourists stand in front of huts that form part of the Lady Elliot Island Eco Resort where a turtle digs for food amongst the coral in the island's lagoon, north-east of the town of Bundaberg in Queensland, Australia, June 9, 2015. UNESCO World Heritage delegates recently snorkelled on Australia’s Great Barrier Reef, thousands of coral reefs, which stretch over 2,000 km off the northeast coast. Surrounded by manta rays, dolphins and reef sharks, their mission was to check the health of the world's largest living ecosystem, which brings in billions of dollars a year in tourism. Some coral has been badly damaged and animal species, including dugong and large green turtles, are threatened. UNESCO will say on Wednesday whether it will place the reef on a list of endangered World Heritage sites, a move the Australian government wants to avoid at all costs, having lobbied hard overseas. Earlier this year, UNESCO said the reef's outlook was "poor". REUTERS/David Gray TPX IMAGES OF THE DAY

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A tourist swims with a sandbar shark on a cageless shark dive tour in Haleiwa, Hawaii February 16, 2015. Shark tours are a renowned form of eco-tourism in Hawaii and diving with sharks without a cage is becoming increasingly popular as well. Picture taken February 16, 2015. REUTERS/Hugh Gentry (UNITED STATES - Tags: ANIMALS SOCIETY ENVIRONMENT TRAVEL)

Shark ecologist Ocean Ramsey(C) guides tourists on a cageless shark dive tour in Haleiwa, Hawaii February 16, 2015. Shark tours are a renowned form of eco-tourism in Hawaii and diving with sharks without a cage is becoming increasingly popular as well. Picture taken February 16, 2015. REUTERS/Hugh Gentry (UNITED STATES - Tags: ANIMALS SOCIETY ENVIRONMENT TRAVEL)

Shark ecologist Ocean Ramsey gives a pre-dive briefing before taking tourists on a cageless shark dive tour in Haleiwa, Hawaii February 16, 2015. Shark tours are a renowned form of eco-tourism in Hawaii and diving with sharks without a cage is becoming increasingly popular as well. Picture taken February 16, 2015. REUTERS/Hugh Gentry (UNITED STATES - Tags: ANIMALS SOCIETY ENVIRONMENT TRAVEL)

Shark ecologist Ocean Ramsey gives a pre-dive briefing before taking tourist on a cage less shark dive tour in Haleiwa, Hawaii February 16, 2015. Shark tours are a popular form of eco-tourism in Hawaii and diving with sharks with out a cage is becoming increasingly popular. Picure taken February 16, 2015. REUTERS/Hugh Gentry (UNITED STATES - Tags: ANIMALS SOCIETY ENVIRONMENT TRAVEL)

Shark ecologist Ocean Ramsey guides tourists on a cageless shark dive tour in Haleiwa, Hawaii February 16, 2015. Shark tours are a renowned form of eco-tourism in Hawaii and diving with sharks without a cage is becoming increasingly popular as well. Picture taken February 16, 2015. REUTERS/Hugh Gentry (UNITED STATES - Tags: ANIMALS ENVIRONMENT SOCIETY TRAVEL)

Tourists swim with sharks on a cageless shark dive tour in Haleiwa, Hawaii February 16, 2015. Shark tours are a renowned form of eco-tourism in Hawaii and diving with sharks without a cage is becoming increasingly popular as well. Picture taken February 16, 2015. REUTERS/Hugh Gentry (UNITED STATES - Tags: ANIMALS SOCIETY)

Shark ecologist Ocean Ramsey (R) takes pictures of tourists swimming with sharks on a cageless shark dive tour in Haleiwa, Hawaii February 16, 2015. Shark tours are a renowned form of eco-tourism in Hawaii and diving with sharks without a cage is becoming increasingly popular as well. Picture taken February 16, 2015. REUTERS/Hugh Gentry (UNITED STATES - Tags: ANIMALS ENVIRONMENT SOCIETY TRAVEL)

Shark ecologist and boat captain Juan Oliphant signals to tourists that a lot of sharks are approaching them on a cageless shark dive tour in Haleiwa, Hawaii February 16, 2015. Shark tours are a renowned form of eco-tourism in Hawaii and diving with sharks without a cage is becoming increasingly popular as well. Picture taken February 16, 2015. REUTERS/Hugh Gentry (UNITED STATES - Tags: ANIMALS ENVIRONMENT SOCIETY TPX IMAGES OF THE DAY TRAVEL)

Tourists take pictures on the banks of Rodrigo de Freitas Lagoon in Rio de Janeiro August 13, 2014. According to local media, the waters of the the lagoon is not suitable for any sporting activities since July 31 due to pollution. The lagoon is one of the aquatic sports venues for the Rio 2016 Olympic Games. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT TRAVEL)

Tourists on Arenal beach take pictures of activists dressed in black as devils, during a protest against oil prospection in the Mediterranean sea in Palma de Mallorca, in the Spanish Balearic island of Mallorca, April 12, 2014. Activists protested against plans for oil prospection off the coast of the Balearic Islands for fears of eco-system danger and negative effect on the tourist industry. REUTERS/Enrique Calvo (SPAIN - Tags: CIVIL UNREST BUSINESS ENERGY POLITICS ENVIRONMENT SOCIETY)

Tourists sunbathing on Arenal beach react as activists dressed in black and as devils protest against oil prospections in the Mediterranean sea, in Palma de Mallorca, in the Spanish Balearic island of Mallorca, April 12, 2014. Activists protested against plans of oil prospections off the coast of the Balearic Islands for fears of eco-system danger and negative effect on the tourist industry. REUTERS/Enrique Calvo (SPAIN - Tags: CIVIL UNREST ENVIRONMENT BUSINESS POLITICS)

Tourists sunbathing on Arenal beach react as activists dressed in black and as devils protest against oil prospections in the Mediterranean sea, in Palma de Mallorca, in the Spanish Balearic island of Mallorca, April 12, 2014. Activists protested against plans of oil prospection off the coast of the Balearic Islands for fears of eco-system danger and negative effect on the tourist industry. REUTERS/Enrique Calvo (SPAIN - Tags: CIVIL UNREST ENVIRONMENT BUSINESS POLITICS TPX IMAGES OF THE DAY)

Activists lie on the beach with their bodies covered in black paint to resemble oil during a protest against oil prospection in the Mediterranean sea in Palma de Mallorca, in the Spanish Balearic island of Mallorca, February 14, 2014. Activists protested against plans of oil prospection off the coast of the Balearic Islands for fears of eco-system danger and negative effect on the tourist industry. REUTERS/Enrique Calvo (SPAIN - Tags: ENVIRONMENT CIVIL UNREST)

An activist dances with her body covered in black paint to resemble oil during a protest against oil prospection in the Mediterranean sea in Palma de Mallorca, in the Spanish Balearic island of Mallorca, February 14, 2014. Activists protested against plans of oil prospection off the coast of the Balearic Islands for fears of eco-system danger and negative effect on the tourist industry. REUTERS/Enrique Calvo (SPAIN - Tags: ENVIRONMENT CIVIL UNREST)

An eco-tourist swims in Cano Cristales in the Sierra de La Macarena National Park in Meta province November 24, 2013. The park is located in the south-east of the Andean nation and the river is locally referred to as the "River of Five Colours" for its vibrant colours which can be observed during the transition between the wet and dry seasons every year. Picture taken November 24, 2013. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: SOCIETY TRAVEL ENVIRONMENT)

An eco-tourist stands close to a stone hole in Cano Cristales in the Sierra de La Macarena National Park in Meta province November 24, 2013. The park is located in the south-east of the Andean nation and the river is locally referred to as the "River of Five Colours" for its vibrant colours which can be observed during the transition between the wet and dry seasons every year. Picture taken November 24, 2013. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: SOCIETY TRAVEL ENVIRONMENT)

An eco-tourist swims in Cano Cristales in the Sierra de La Macarena National Park in Meta province November 23, 2013. The park is located in the south-east of the Andean nation and the river is locally referred to as the "River of Five Colours" for its vibrant colours which can be observed during the transition between the wet and dry seasons every year. Picture taken November 23, 2013. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: SOCIETY ENVIRONMENT TRAVEL)

An eco-tourist walks through part of the Cano Cristales in the Sierra de La Macarena National Park in Meta province November 23, 2013. The park is located in the south-east of the Andean nation and the river is locally referred to as the "River of Five Colours" for its vibrant colours which can be observed during the transition between the wet and dry seasons every year. Picture taken November 23, 2013. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: SOCIETY ENVIRONMENT TRAVEL)

Eco-tourists walk through part of the Cano Cristales in the Sierra de La Macarena National Park in Meta province November 23, 2013. The park is located in the south-east of the Andean nation and the river is locally referred to as the "River of Five Colours" for its vibrant colours which can be observed during the transition between the wet and dry seasons every year. Picture taken November 23, 2013. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: ENVIRONMENT SOCIETY TRAVEL)

Tourists Caro (L) and Anna from Munich ride on a "Bed Bike" in the Prenzlauer Berg district of Berlin, July 5, 2013. Richard Eckes of Berlin Horizontal offers tourists a ride on a double bed through central Berlin, powering an electric four-wheel cargo-bike that has a berth and a mattress including comfortable bedding for a load. Picture taken July 5, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SOCIETY TRANSPORT TRAVEL)

Tourists Caro (L) and Anna from Munich ride on a "Bed Bike" along Friedrichstrasse in central Berlin, July 5, 2013. Richard Eckes of Berlin Horizontal offers tourists a ride on a double bed through central Berlin, powering an electric four-wheel cargo-bike that has a berth and a mattress including comfortable bedding for a load. Picture taken July 5, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SOCIETY TRANSPORT TRAVEL TPX IMAGES OF THE DAY)

Colored leather made from treated fish skin by Esther Nunez of Argentina, to be used in fashion and to make eco-friendly jewellery, is seen in Puerto Lopez, some 350 km (217 miles) west of Quito, November 16, 2012. This process uses no chemicals, and makes use of fish skin, which is usually discarded by fishermen. Nunez is looking to employ disabled people in this trade to make products to be sold to tourists. REUTERS/Guillermo Granja (ECUADOR - Tags: SOCIETY BUSINESS TEXTILE)

Pieces of treated fish skin, to be used in fashion and to make eco-friendly jewellery, are seen in Puerto Lopez, some 350 km (217 miles) west of Quito, November 16, 2012. This process uses no chemicals, and makes use of fish skin, which is usually discarded by fishermen. Esther Nunez of Argentina is looking to employ disabled people in this trade to make products to be sold to tourists. REUTERS/Guillermo Granja (ECUADOR - Tags: BUSINESS SOCIETY TEXTILE)

Esther Nunez of Argentina demonstrates to disabled children and their mothers how to make leather from fish skin, to be used in fashion and to make eco-friendly jewellery, in Puerto Lopez, some 350 km (217 miles) west of Quito, November 16, 2012. This process uses no chemicals, and makes use of fish skin, which is usually discarded by fishermen. Nunez is looking to employ disabled people in this trade to make products to be sold to tourists. REUTERS/Guillermo Granja (ECUADOR - Tags: BUSINESS SOCIETY TEXTILE)

Esther Nunez of Argentina, treats fish skin to make a type of leather to be used in fashion and to make eco-friendly jewellery, in Puerto Lopez, some 350 km (217 miles) west of Quito, November 16, 2012. This process uses no chemicals, and makes use of fish skin, which is usually discarded by fishermen. Nunez is looking to employ disabled people in this trade to make products to be sold to tourists. REUTERS/Guillermo Granja (ECUADOR - Tags: SOCIETY BUSINESS TEXTILE)

Esther Nunez of Argentina, treats fish skin to make a type of leather to be used in fashion and to make eco-friendly jewellery, in Puerto Lopez, some 350 km (217 miles) west of Quito, November 16, 2012. This process uses no chemicals, and makes use of fish skin, which is usually discarded by fishermen. Nunez is looking to employ disabled people in this trade to make products to be sold to tourists. REUTERS/Guillermo Granja (ECUADOR - Tags: SOCIETY BUSINESS TEXTILE)

A man wearing a skull mask rides his bicycle as he carries a giant banner, reading "Ecotourists and a signal SOS ", at the main Zocalo square in Mexico City April 22, 2012. REUTERS/Henry Romero (MEXICO - Tags: SOCIETY)

A whale shark (Rhincodon typus) swims near a boat with tourists in the Caribbean Sea in Isla Mujeres July 14, 2011.The Whale Shark Annual Festival has been taking place in Isla Mujeres since 2008 to promote eco-tourism and the conservation of this species considered vulnerable under the The IUCN Red List of Threatened Species. REUTERS/Victor Ruiz Garcia (MEXICO - Tags: SOCIETY ANIMALS)

A tourist looks at garbage left on the streets during a protest by public sector workers demanding for an increase in their salaries, in Valparaiso City, about 93 km (58 miles) northwest of Santiago, December 12, 2010. REUTERS/Eliseo Fernandez (CHILE - Tags: POLITICS CIVIL UNREST EMPLOYMENT BUSINESS SOCIETY IMAGES OF THE DAY)

A group of eco-tourists walks at the entrance of Sierra de La Macarena National Park during their visit to Cano Cristales river in Meta October 1, 2010. The park is located in the south of the Andean nation and the river is locally referred as "the river of five colours". Picture taken October 1, 2010. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: SOCIETY)

Eco-tourists visit Cano Cristales river at Sierra de La Macarena National Park in Meta September 30, 2010. The park is located in the south of the Andean nation and the river is locally referred as "the river of five colours". Picture taken September 30, 2010. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: ENVIRONMENT)

Eco-tourists float in Cano Cristales river at Sierra de La Macarena National Park in Meta October 2, 2010. The park is located in the south of the Andean nation and the river is locally referred as "the river of five colours". Picture taken October 2, 2010. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: ENVIRONMENT)

An eco-tourist swims in Cano Cristales river at Sierra de La Macarena National Park in Meta October 2, 2010. The park is located in the south of the Andean nation and the river is locally referred as "the river of five colours". Picture taken October 2, 2010. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: ENVIRONMENT)

An eco-tourist walks over Cano Cristales river at Sierra de La Macarena National Park in Meta October 1, 2010. The park is located in the south of the Andean nation and the river is locally referred as "the river of five colours". Picture taken October 1, 2010. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: SOCIETY ENVIRONMENT)

A group of eco-tourists walk over Cano Cristales river at Sierra de La Macarena National Park in Meta October 1, 2010. The park is located in the south of the Andean nation and the river is locally referred as "the river of five colours". Picture taken October 1, 2010. REUTERS/Jose Miguel Gomez (COLOMBIA - Tags: SOCIETY)

General view of a tree-house in Le Pian Medoc, southwestern France, April 24, 2009. France's Natura Cabana company rents various cabins perched in the trees for ecological holidays. Picture taken April 24, 2009. REUTERS/Regis Duvignau (FRANCE ENVIRONMENT TRAVEL)

Inside view of a tree-house in Le Pian Medoc, southwestern France, April 24, 2009. France's Natura Cabana company rents various cabins perched in the trees for ecological holidays. Picture taken April 24, 2009. REUTERS/Regis Duvignau (FRANCE ENVIRONMENT TRAVEL)

General view of a tree-house in Le Pian Medoc, southwestern France, April 24, 2009. France's Natura Cabana company rents various cabins perched in the trees for ecological holidays. Picture taken April 24, 2009. REUTERS/Regis Duvignau (FRANCE ENVIRONMENT TRAVEL)

General view of a tree-house in Le Pian Medoc, southwestern France, April 24, 2009. France's Natura Cabana company rents various cabins perched in the trees for ecological holidays. REUTERS/Regis Duvignau (FRANCE ENVIRONMENT TRAVEL)

General view of a tree-house in Le Pian Medoc, southwestern France, April 24, 2009. France's Natura Cabana company rents various cabins perched in the trees for ecological holidays. REUTERS/Regis Duvignau (FRANCE ENVIRONMENT TRAVEL)

General view of a tree-house in Le Pian Medoc, southwestern France, April 24, 2009. France's Natura Cabana company rents various cabins perched in the trees for ecological holidays. REUTERS/Regis Duvignau (FRANCE ENVIRONMENT TRAVEL)

A view of the Kapawi river, in the Ecuadorean rainforest of Kapawi, some 165 miles (266 kilometers) southwest of Quito October 20, 2008. Kapawi is known for its eco-tourism and it is also home to the Ashuar Indians, the last indigenous group still residing the Ecuadorian rainforest, according to internet sources. REUTERS/Guillermo Granja (ECUADOR)

Burnt forest are seen on the edge of the Borjomi-Kharagauli national park near Tsagveri September 5, 2008. A blaze broke out at the height of Georgia's brief war with Russia and burned for weeks, ravaging up to 950 hectares (2,350 acres) of forest on the edge of the Borjomi-Kharagauli national park, known for rare flora and fauna and a favoured destination for "eco-tourists". The damage to the mountains above Daba, some 160 km (100 miles) southwest of Tbilisi, is seen as a national tragedy by environmentalists, Georgian officials and locals and the Georgian government says it will take 50 to 70 years for the burnt sections of the forest to regrow. Picture taken September 5, 2008. To match feature GEORGIA-OSSETIA/FOREST REUTERS/Niko Mchedlishvili (GEORGIA)

Burnt forest are seen on the edge of the Borjomi-Kharagauli national park near Tsagveri September 5, 2008. A blaze broke out at the height of Georgia's brief war with Russia and burned for weeks, ravaging up to 950 hectares (2,350 acres) of forest on the edge of the Borjomi-Kharagauli national park, known for rare flora and fauna and a favoured destination for "eco-tourists". The damage to the mountains above Daba, some 160 km (100 miles) southwest of Tbilisi, is seen as a national tragedy by environmentalists, Georgian officials and locals and the Georgian government says it will take 50 to 70 years for the burnt sections of the forest to regrow. Picture taken September 5, 2008. To match feature GEORGIA-OSSETIA/FOREST REUTERS/Niko Mchedlishvili (GEORGIA)

Local resident Mikheil Tediashvili, 80, chops tree in a burnt forest on the edge of the Borjomi-Kharagauli national park near Tsagveri September 5, 2008. A blaze broke out at the height of Georgia's brief war with Russia and burned for weeks, ravaging up to 950 hectares (2,350 acres) of forest on the edge of the Borjomi-Kharagauli national park, known for rare flora and fauna and a favoured destination for "eco-tourists". The damage to the mountains above Daba, some 160 km (100 miles) southwest of Tbilisi, is seen as a national tragedy by environmentalists, Georgian officials and locals and the Georgian government says it will take 50 to 70 years for the burnt sections of the forest to regrow. Picture taken September 5, 2008. To match feature GEORGIA-OSSETIA/FOREST REUTERS/Niko Mchedlishvili (GEORGIA)

A sailboat carries tourists at sunset off Tamarindo beach, in Santa Cruz de Guanacaste, 250 miles (402.34 km) north of San Jose, April 28, 2008. Problems with sewage disposal in the ocean and destruction of habitat for monkeys and other wildlife along with drugs and prostitution in the tourist towns threatens to take some of the shine off Costa Rica's reputation as an eco-tourism paradise, they say. Picture taken April 28,2008.To go with COSTA RICA-TAMARINDO-DEVELOPMENT. REUTERS/Juan Carlos Ulate (COSTA RICA)

Men surf at sunset in Tamarindo beach, in Santa Cruz de Guanacaste, 250 miles (402.34 km) north of San Jose, April 28, 2008. Problems with sewage disposal in the ocean and destruction of habitat for monkeys and other wildlife along with drugs and prostitution in the tourist towns threatens to take some of the shine off Costa Rica's reputation as an eco-tourism paradise, they say. Picture taken April 28,2008.
To go with COSTA RICA -TAMARINDO-DEVELOPMENT. REUTERS/Juan Carlos Ulate (COSTA RICA)

A sailboat carries tourists at sunset off Tamarindo beach, in Santa Cruz de Guanacaste, 250 miles (402.34 km) north of San Jose, April 28, 2008. Problems with sewage disposal in the ocean and destruction of habitat for monkeys and other wildlife along with drugs and prostitution in the tourist towns threatens to take some of the shine off Costa Rica's reputation as an eco-tourism paradise, they say. Picture taken April 28,2008.To go with COSTA RICA-TAMARINDO-DEVELOPMENT. REUTERS/Juan Carlos Ulate (COSTA RICA)

Surfers leave the Pacific Ocean during sunset at Tamarindo beach, in Santa Cruz de Guanacaste, 250 miles (402.34 km) north of San Jose, April 28, 2008. Problems with sewage disposal in the ocean and destruction of habitat for monkeys and other wildlife along with drugs and prostitution in the tourist towns threatens to take some of the shine off Costa Rica's reputation as an eco-tourism paradise, they say. Picture taken April 28,2008.
To go with COSTA RICA-TAMARINDO-DEVELOPMENT. REUTERS/Juan Carlos Ulate (COSTA RICA)

A boy walks on Tamarindo beach, in Santa Cruz de Guanacaste, 250 miles (402.34 km) north of San Jose, April 29, 2008. Problems with sewage disposal in the ocean and destruction of habitat for monkeys and other wildlife along with drugs and prostitution in the tourist towns threatens to take some of the shine off Costa Rica's reputation as an eco-tourism paradise, they say. Picture taken April 29,2008.
To go with COSTA RICA-TAMARINDO-DEVELOPMENT. REUTERS/Juan Carlos Ulate (COSTA RICA)

A surfer rides on the waves during sunset at Tamarindo beach, in Santa Cruz de Guanacaste, 250 miles (402 km) north of San Jose, April 28, 2008. Once home to monkeys, turtles and other rare wildlife, this stretch of coast in northwest Costa Rica is developing so fast that it is tarnishing the country's reputation as a destination for eco-tourists. Photo taken April 28, 2008. To match feature COSTARICA-ENVIRONMENT/ REUTERS/Juan Carlos Ulate (COSTA RICA)