A general view of waste from Guatemala's largest landfill on the Las Vacas river basin ahead of World Water Day in Guatemala City, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

A man searches for scrap metal in the polluted waters of the Las Vacas river, where informal workers salvage items from Guatemala's largest landfill, ahead of World Water Day in Guatemala City, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

Men throw waste on the banks of the Las Vacas river ahead of World Water Day in Chinautla, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

A man known as "Canche" poses for a portrait after working in the polluted waters of the Las Vacas river, where informal workers collect scrap metal from Guatemala's largest landfill, ahead of World Water Day in Guatemala City, Guatemala March 21, 2023. REUTERS/Josue Decavele 

A cow and her calves cross the polluted waters of the Las Vacas river ahead of World Water Day in Chinautla, Guatemala March 21, 2023. REUTERS/Josue Decavele 

A general view of waste from Guatemala's largest landfill on the Las Vacas river basin ahead of World Water Day in Guatemala City, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

Anayeli, 21, and Francisco, 7, cross the polluted waters of the Las Vacas River ahead of World Water Day in Chinautla, Guatemala March 21, 2023. REUTERS/Josue Decavele 

A general view of waste from Guatemala's largest landfill on the Las Vacas river basin ahead of World Water Day in Guatemala City, Guatemala March 21, 2023. REUTERS/Josue Decavele 

A man carries scrap metal collected from the polluted waters of the Las Vacas river, where informal workers salvage items from Guatemala's largest landfill, ahead of World Water Day in Guatemala City, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

A men searches for scrap metal in the polluted waters of the Las Vacas river, where informal workers salvage items from Guatemala's largest landfill, ahead of World Water Day in Guatemala City, Guatemala March 21, 2023. REUTERS/Josue Decavele 

A general view of an illegal dump on the banks of the Las Vacas river ahead of World Water Day in Guatemala City, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

A general view of an illegal dump on the bank of the Las Vacas river ahead of World Water Day in Chinautla, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

Man searches for scrap metal in the polluted waters of the Las Vacas river, where informal workers salvage items from Guatemala's largest landfill, ahead of World Water Day in Guatemala City, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

Abner, 12, and Anderson, 9, cross the polluted waters of the Las Vacas river ahead of World Water Day in Chinautla, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

Irma, 40, and Maria Virginia, 51, talk after crossing the polluted waters of the Las Vacas River ahead of World Water Day in Chinautla, Guatemala March 21, 2023. REUTERS/Josue Decavele 

Man searches for scrap metal in the polluted waters of the Las Vacas river, where informal workers salvage items from Guatemala's largest landfill, ahead of World Water Day in Guatemala City, Guatemala, March 21, 2023. REUTERS/Josue Decavele 

A man searches for scrap metal in the polluted waters of the Las Vacas river, where informal workers salvage items from Guatemala's largest landfill, ahead of World Water Day in Guatemala City, Guatemala March 21, 2023. REUTERS/Josue Decavele 

A man looks at the polluted waters of the Las Vacas river, where informal workers salvage items from Guatemala's largest landfill, ahead of World Water Day in Guatemala City, Guatemala March 21, 2023. REUTERS/Josue Decavele 

Khaled Raafat, co-founder of TileGreen, poses for a photograph and sits next to eco-friendly tiles made from different types of plastic and waste in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

An employee of TileGreen factory works at eco-friendly tile from different types of plastic and waste in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

An employee of TileGreen factory works at eco-friendly tile made from different types of plastic and waste in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

A view of coloured eco-friendly tiles made from different types of plastic and waste in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

An employee of TileGreen factory carries different types of plastic and waste to make interlocking tiles with different colours in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

A view of the process to make interlocking tiles with different colours from different types of plastic and waste at TileGreen factory, in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

Employees of TileGreen factory work at eco-friendly tiles made from different types of plastic and waste in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

An employee of TileGreen factory works with different types of plastic and waste to make interlocking tiles with different colours in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

Employees of TileGreen factory work at eco-friendly tiles made from different types of plastic and waste in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

An employee of TileGreen factory carries different types of plastic and waste to make interlocking tiles with different colours in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud TPX IMAGES OF THE DAY 

An employee of TileGreen factory checks parts of different types of plastic and waste to make interlocking tiles with different colours in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

An employee of TileGreen factory works with different types of plastic and waste to make interlocking tiles with different colours in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

An employee of TileGreen factory squeezes different types of plastic and waste to make interlocking tiles with different colours in the 10th of Ramadan City district northwest of Cairo, Egypt March 15, 2023. An Egyptian start-up, TileGreen, is manufacturing interlocking tiles from recycled plastic and waste in an effort to reduce dependency on cement, which is a major polluter in the country. REUTERS/Hadeer Mahmoud 

Cows stand among manure on the ground at a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

Cows stand at a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

A view shows cows at a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

Cows stand among manure on the ground at a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

Cows eat at a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

A farmer works at his dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw TPX IMAGES OF THE DAY 

Cows eat on a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

A view shows cows on a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

Cows eat on a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

Cows eat on a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

A view shows cows on a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

A cow eats on a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

People wear face masks in the Central Business District (CBD) on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

People cross a street in the Central Business District (CBD) on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

People cross a street in the Central Business District (CBD) on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

A man in a traditional costume crosses a street in the Central Business District (CBD) on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

A cyclist waits to cross a street on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

People on scooters are stuck in evening rush hour traffic in the Central Business District (CBD) on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

A man works in a scooter repair shop on a polluted evening in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

People wait in evening rush hour traffic in the Central Business District (CBD) on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

People on scooters wait in evening rush hour traffic in the Central Business District (CBD) on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

A cyclist wears a respirator mask on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

Delivery drivers rest in a shopping district on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter 

A woman and a child sit on a scooter as they wait in evening rush hour traffic in the Central Business District (CBD) on a polluted day in Beijing, China, March 10, 2023. REUTERS/Thomas Peter TPX IMAGES OF THE DAY 

Trajce Stafilov, a professor at the Faculty of Natural Sciences and Mathematics, presents an arsenic ore which is sensitive to light, during a conversation with Reuters in Skopje, North Macedonia March 9, 2023. REUTERS/Ognen Teofilovski 

Fatmir Selmani, a resident of the village of Lojane, looks at a jug with a water filter, in Lojane, North Macedonia March 9, 2023. REUTERS/Ognen Teofilovski 

Afrim Zymberi, a geography teacher, stands with students, in Lojane, North Macedonia March 9, 2023. REUTERS/Ognen Teofilovski 

Afrim Zymberi, a geography teacher, speaks to Reuters about the waste dumped close to a school, in Lojane, North Macedonia March 9, 2023. REUTERS/Ognen Teofilovski