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A general view shows the Eiffel Tower and the Paris skyline through a small-particle haze.
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Devotees worship the Sun god Surya in the polluted waters of the river Yamuna.
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Egyptians crowd a public beach during a hot day in the Mediterranean city of Alexandria.
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Trash floats on top of the polluted water of Billings reservoir in Sao Paulo.
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Villagers wash clothes in the garbage-filled Shenling River, in Yuexi county, Anhui province.
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A bird eats a fish surrounded by dead fish on the banks of the Guanabara Bay in Rio de Janeiro.
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A sofa is pictured in the Sao Bento beach at Guanabara Bay, which receives waters from polluted rivers in Rio de Janeiro.
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An aerial view shows illegally built slums on the border of the polluted water of Billings reservoir in Sao Paulo.
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A man cups algae-filled water in his hands at the Donghu Lake in Wuhan, Hubei province.
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A man points to water and soil which turned red after being contaminated by industrial waste from a closed dye factory in Ruyang county, Henan province.
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A volunteer holds sand mixed with plastic pellets during a clean-up of a beach during Hong Kong's Discovery Day.
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A villager holds two bottles of water, one from a white polluted stream (L), and the other normal mineral water, in Dongchuan district of Kunming, Yunnan province.
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A view of Los Angeles, California.
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A man stands on a boat on the banks of the river Yamuna in New Delhi.
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Biologist Mario Moscatelli stands on rubbish on the banks of Cunha channel, which flows into Guanabara Bay, in Rio de Janeiro.
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Scrapped high-emission vehicles are seen piled up at a dump site of a recycling centre, waiting to be dismantled, in Yiwu, Zhejiang province.
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A volunteer collects fuel oil from rocks at the 'Muelle Viejo' beach in Gran Canaria in Spain's Canary Islands.
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Traffic jam at the 6th October bridge and Ramses Street in downtown Cairo, Egypt.
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A man drives a boat along a river polluted by leaked fuel, in Shaoxing, Zhejiang province, China.
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A woman paddles in a makeshift boat as she collects recyclable trash from a polluted river in Navotas city.
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Cars are stuck in a traffic jam during sunset in Moscow, Russia.
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Overcrowded building at a college in Wuhan, Hubei province.