Police cars accompany a protest of environmentalists on Theresienwiese where Oktoberfest would have started today, amid the COVID-19 pandemic in Munich, Germany, September 19, 2020. REUTERS/Andreas Gebert

A police special forces officer brings down a protester staging a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach TPX IMAGES OF THE DAY

Police officers detain a protester staging a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

A police special forces officer brings down a protester staging a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

A police special forces officer tries to bring down a protester staging a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

A police special forces officer tries to bring down a protester staging a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Police special forces officers try to bring down a protester staging a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Police special forces officers try to bring down a protester staging a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Police special forces officers arrive as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

A police special forces officer is seen as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Police special forces officers are seen as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Police special forces officers are seen as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

A protester stages a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

A protester stages a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Demonstrators are seen as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

A police officer walks as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

A protester stages a blockade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

General view of a barricade as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Police officers stand as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Police officers stand as the police and forest workers clear a camp at the Dannenrod forest during a protest of environmentalists against the extension of the highway Autobahn 49, in Dannenrod, September 16, 2020. REUTERS/Kai Pfaffenbach

Kenyan environmentalist Ikal Angelei speaks with fisherman Fitbo Lalukol on a beach at Lake Turkana, near the town of Kalokol, Turkana county, Kenya, July 4, 2020. Picture taken July 4, 2020. REUTERS/Baz Ratner

Former Brazilian presidential candidate for the Green Party Marina Silva and environmentalist Alfredo Sirkis attend a news conference after a meeting with the Party leadership in Brasilia, Brazil October 13, 2010. Picture taken October 13, 2010. REUTERS/Ricardo Moraes

Forest Engineer Felipe Esbrissa and environmentalist Dejesus Aparecido walk at the National Forest of Jamari in Itapua do Oeste, Brazil, February 17, 2020. Picture taken February 17, 2020. REUTERS/Alexandre Meneghini

Environmentalist Dejesus Aparecido checks a tree at the National Forest of Jamari in Itapua do Oeste, Brazil, February 17, 2020. Picture taken on February 17, 2020. REUTERS/Alexandre Meneghini

An Environmentalist, Doyinsola Ogunye poses for a portrait, standing in front of bags of P.E.T bottles picked from the shore at the beach in Lagos, Nigeria February 25, 2020. Picture taken February 25, 2020. REUTERS/Temilade Adelaja

An Environmentalist, Doyinsola Ogunye holds a net filled with P.E.T bottles picked from the shore at the beach in Lagos, Nigeria February 25, 2020. Picture taken February 25, 2020. REUTERS/Temilade Adelaja

An Environmentalist, Doyinsola Ogunye stands in front of a heap of footwear picked from the shore at the beach in Lagos, Nigeria February 25, 2020. Picture taken February 25, 2020. REUTERS/Temilade Adelaja

Indigenous leader Cacique Raoni of the Kayapo tribe greets Angela Mendes, daughter of late environmentalist Chico Mendes, during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 16, 2020. REUTERS/Ricardo Moraes

A kid looks on as Indigenous leader Cacique Raoni of Kayapo tribe talks during a joint declaration to the media with Indigenous leader Sonia Guajajara and Angela Mendes, daughter of late environmentalist Chico Mendes, during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 15, 2020. REUTERS/Ricardo Moraes

Kids play on Xingu River during a joint declaration to the media by Indigenous leaders Cacique Raoni of Kayapo tribe (C) and Sonia Guajajara (3rd L), and Angela Mendes (2nd R), daughter of late environmentalist Chico Mendes, during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 15, 2020. REUTERS/Ricardo Moraes

Indigenous leader Cacique Raoni of Kayapo tribe (L) talks during a joint declaration to media with Indigenous leader Sonia Guajajara (not pictured) and Angela Mendes (2nd R), daughter of late environmentalist Chico Mendes, during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 15, 2020. REUTERS/Ricardo Moraes

A general view of a joint declaration to media by Indigenous leaders Cacique Raoni and Sonia Guajajara, and Angela Mendes, daughter of late environmentalist Chico Mendes, on the banks of Xingu River, during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 15, 2020. REUTERS/Ricardo Moraes

Indigenous leader Cacique Raoni of Kayapo tribe (R) talks during a joint declaration to media with Indigenous leader Sonia Guajajara (L) and Angela Mendes (not pictured), daughter of late environmentalist Chico Mendes, during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 15, 2020. REUTERS/Ricardo Moraes

Indigenous leader Cacique Raoni of Kayapo tribe (C) talks during a joint declaration to the media, with Indigenous leader Sonia Guajajara (3rd L) and Angela Mendes (2nd R), daughter of late environmentalist Chico Mendes, during a four-day pow wow in Piaracu village, in Xingu Indigenous Park, near Sao Jose do Xingu, Mato Grosso state, Brazil, January 15, 2020. REUTERS/Ricardo Moraes

Brazilian president Jair Bolsonaro has vowed to repave an old military highway through the heart of the Amazon rainforest, which environmentalists and scientists say will lead to catastrophic levels of deforestation. embed code and instructions: https://reut.rs/2ovoG9y

Brazilian president Jair Bolsonaro has vowed to repave an old military highway through the heart of the Amazon rainforest, which environmentalists and scientists say will lead to catastrophic levels of deforestation. embed code and instructions: https://reut.rs/2ovoG9y

Brazilian president Jair Bolsonaro has vowed to repave an old military highway through the heart of the Amazon rainforest, which environmentalists and scientists say will lead to catastrophic levels of deforestation.

Brazilian president Jair Bolsonaro has vowed to repave an old military highway through the heart of the Amazon rainforest, which environmentalists and scientists say will lead to catastrophic levels of deforestation.

Brazilian president Jair Bolsonaro has vowed to repave an old military highway through the heart of the Amazon rainforest, which environmentalists and scientists say will lead to catastrophic levels of deforestation. embed code and instructions: https://reut.rs/2ovoG9y

Television presenter and environmentalist Chris Packham holds a plant as he joins Extinction Rebellion and anti-HS2 protesters as they demonstrate outside the High Speed 2 headquarters at Euston Station in London, Britain September 28, 2019. REUTERS/Simon Dawson

A placard reading "Shut down highways" is displayed as environmentalists block the entrance to the venue of International Frankfurt Motorshow (IAA) as they protest against climate-damaging cars in Frankfurt, Germany, September 15, 2019. REUTERS/Wolfgang Rattay

Environmentalists block the entrance to the venue of International Frankfurt Motorshow (IAA) as they protest against climate-damaging cars in Frankfurt, Germany, September 15, 2019. REUTERS/Wolfgang Rattay

A protester has her face painted as environmentalists block the entrance to the venue of International Frankfurt Motorshow (IAA) as they protest against climate-damaging cars in Frankfurt, Germany, September 15, 2019. The banner reads "Turn back now!" REUTERS/Wolfgang Rattay

A masked protester holds a banner as environmentalists block the entrance to the venue of International Frankfurt Motorshow (IAA) as they protest against climate-damaging cars in Frankfurt, Germany, September 15, 2019. The banner reads "Turn back now!" REUTERS/Wolfgang Rattay

Environmentalists block the entrance to the venue of International Frankfurt Motorshow (IAA) as they protest against climate-damaging cars in Frankfurt, Germany, September 15, 2019. REUTERS/Wolfgang Rattay

Environmentalists block the entrance to the venue of International Frankfurt Motorshow (IAA) as they protest against climate-damaging cars in Frankfurt, Germany, September 15, 2019. REUTERS/Wolfgang Rattay

Environmentalists block the entrance to the venue of International Frankfurt Motorshow (IAA) as they protest against climate-damaging cars in Frankfurt, Germany, September 15, 2019. REUTERS/Wolfgang Rattay

Environmentalists block the entrance to the venue of International Frankfurt Motorshow (IAA) as they protest against climate-damaging cars in Frankfurt, Germany, September 15, 2019. REUTERS/Wolfgang Rattay

Activist, environmentalist, community leader and undertaker Peter Macfadyen stands next to a painted storage unit on the banks of the River Frome, in Frome, Britain, June 25, 2019. Picture taken June 25, 2019. REUTERS/Toby Melville REFILE - CORRECTING SURNAME SPELLING

Activist, environmentalist, community leader and undertaker Peter Macfadyen stands on the banks of the River Frome, in Frome, Britain, June 25, 2019. Picture taken June 25, 2019. REUTERS/Toby Melville REFILE - CORRECTING SURNAME SPELLING

Activist, environmentalist, community leader and undertaker Peter Macfadyen stands next to a painted storage unit on the banks of the River Frome, in Frome, Britain, June 25, 2019. Picture taken June 25, 2019. REUTERS/Toby Melville REFILE - CORRECTING SURNAME SPELLING

Activist, environmentalist, community leader and undertaker Peter Macfadyen stands on the banks of the River Frome, in Frome, Britain, June 25, 2019. Picture taken June 25, 2019. REUTERS/Toby Melville REFILE - CORRECTING SURNAME SPELLING

Activist, environmentalist, community leader and undertaker Peter Macfadyen stands on the banks of the River Frome, in Frome, Britain, June 25, 2019. Picture taken June 25, 2019. REUTERS/Toby Melville REFILE - CORRECTING SURNAME SPELLING

Activist, environmentalist, community leader and undertaker Peter Macfadyen poses with Frome Resilience Officer Anna Francis beside the Community Fridge, a place where anybody can take daily donations of food and clothing items for free, in Frome, Britain, June 25, 2019. Picture taken June 25, 2019. REUTERS/Toby Melville REFILE - CORRECTING SURNAME SPELLING

Isaac Callizaya grew up with the sound of waves lapping on the shores of Lake Titicaca, a giant body of water on the border between Bolivia and Peru that at 3,800 meters (12,500 ft) above sea level is the highest navigable lake in the world. The island fishing community near Titicaca's southern tip that he was born into has seen big changes over the years. Many have moved away from the village on Pariti island, while urban sprawl from nearby cities has created a rising problem of pollution, altering the lake's landscape and forcing those that live around it to adapt. Environmentalists are getting worried about the long-term impact to the lake, a popular destination for visitors to the region, who come to see its icy azure waters with their Andean mountain backdrop and traditional communities, some of whom live on manmade islands constructed entirely from reeds. The lake was once considered a deity by the pre-Columbian people that lived on its shores. Its high-altitude environment is of major interest to climate change researchers, too, because ecosystems of its kind are highly sensitive to global warming, making it an early-warning marker of changes happening more broadly to the planet. The photographer on this story was part of the 2018 Reuters photojournalism grant program. REUTERS/Manuel Seoane SEARCH "TITICACA CLIMATE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: CLIMATE-CHANGE/TITICACA