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The Manhattan skyline is seen behind a tree on Roosevelt Island in New York June 4, 2013. World Environment Day is celebrated annually on June 5 to raise global awareness about environmental issues and stimulate political action, according to the United Nations Environment Programme. REUTERS/Zoran Milich ( USA/ )

Buffaloes wade through polluted sewage water filled with water hyacinth in Allahabad, India, Wednesday, June 5, 2013. World Environment Day is celebrated on June 5 every year by the United Nations to stimulate global awareness on environmental issues. (AP Photo/Rajesh Kumar Singh) ( India World Environment Day )

A shepherd herds his flock of sheep as he passes one of the capital's garbage landfills at Gazipur in New Delhi on June 4, 2013, on the eve of World Environment Day. As per newspaper reports, the Indian capital produces 9,000 tons of garbage daily. India's cities are becoming more polluted and unhealthy, according to a new survey published Monday showing growing concern about the impact of high economic growth on the environment. PRAKASH SINGH/AFP/Getty Images ( 520282356 )

A Mongolian herder with his flock of sheep, goats and cattle head towards grasslands on World Environment Day at the Hustai National Park in Mongolia on June 5, 2013. The World Environment Day celebration began in 1972 by the United Nations and is used to raise worldwide awareness of the environment and encourage political attention and action. MARK RALSTON/AFP/Getty Images ( 520311270 )

Greater Adjutant storks stand at a garbage dump near Deepor Beel wildlife sanctuary on the outskirts of Gauhati, India, Wednesday, June 5, 2013. The World Environment Day is celebrated June 5 every year by the United Nations to stimulate global awareness on environmental issues. Assam has a large concentration of the Greater Adjutant Storks but their numbers are gradually declining due to the loss of wetlands, habitat and declining availability of food. (AP Photo/Anupam Nath) ( India World Environment Day )

An Indian boy carries a water container as he walks at a drying up water pond on the outskirts of Ranchi, the capital of central Jharkhand state on June 4, 2013, on the eve of World Environment Day. India's cities are becoming more polluted and unhealthy, according to a new survey published Monday showing growing concern about the impact of high economic growth on the environment. PHOTOSTR/AFP/Getty Images ( 520282743 )

A worker walks past piles of plastic PET bottles at Asia's largest PET plastic recycling factory INCOM Resources Recovery in Beijing May 7, 2013. According to government figures, reported in local media, about 4.67 million tons of recyclable waste was collected in Beijing in 2010. In the same year, 6.35 million tons of trash ended up in landfill in the city. World Environment Day is celebrated annually on June 5. Picture taken May 7, 2013. REUTERS/Kim Kyung-Hoon ( CHINA/ )

A man walks between heaps of plastic bottles at an industrial area on World Environment Day on the outskirts of Jammu, India, Wednesday, June 5, 2013. World Environment Day is celebrated every year by the United Nations to stimulate global awareness on environmental issues. (AP Photo/Channi Anand) ( India World Environment Day )

A worker shows recycled PET plastic shatter, a material used for producing new PET bottles, at Asia's largest PET plastic recycling factory INCOM Resources Recovery in Beijing May 7, 2013. According to government figures, reported in local media, about 4.67 million tons of recyclable waste was collected in Beijing in 2010. In the same year, 6.35 million tons of trash ended up in landfill in the city. World Environment Day is celebrated annually on June 5. Picture taken May 7, 2013. REUTERS/Kim Kyung-Hoon ( CHINA/ )

A cow walks through garbage landfills in an Indian slum in Mumbai on June 4, 2013, on the eve of World Environment Day. India's cities are becoming more polluted and unhealthy, according to a new survey published Monday showing growing concern about the impact of high economic growth on the environment. The Energy and Resources Institute (TERI) research group based in New Delhi questioned 4,039 people living in India's six biggest cities about their perceptions, opinions and awareness of the environment and green issues over the last five years. PUNIT PARANJPE/AFP/Getty Images ( 520283249 )

An Indian ragpicker walks among heaps of rubbish at a municipal waste dump in Dimapur, on April 22, 2013. India's cities are becoming more polluted and unhealthy, according to a new survey published June 6, 2013, showing growing concern about the impact of high economic growth on the environment. The Energy and Resources Institute (TERI) research group based in New Delhi questioned 4,039 people living in India's six biggest cities about their perceptions, opinions and awareness of the environment and green issues over the last five years. STRDEL/AFP/Getty Images ( 520260036 )

Cows eat rotten fruit at a vegetable market in Bangalore, India, Wednesday, June 5, 2013. The World Environment Day is celebrated June 5 every year by the United Nations to stimulate global awareness on environmental issues. (AP Photo/Aijaz Rahi) ( India World Environment Day )

Birds circle as trash burns on one of the capital's garbage landfills at Gazipur in New Delhi on June 4, 2013, on the eve of World Environment Day. As per newspaper reports, the Indian capital produces 9,000 tons of garbage daily. India's cities are becoming more polluted and unhealthy, according to a new survey published Monday showing growing concern about the impact of high economic growth on the environment. PRAKASH SINGH/AFP/Getty Images ( 520282371 )

A boy sits in a wooden boat transporting him across a river to go to school in Jakarta June 5, 2013. Local residents say that they are highly dependent on the river due to their lack of shower, washing and toilet facilities. World Environment Day is celebrated annually on June 5. REUTERS/Enny Nuraheni ( INDONESIA )

Zahira Biwi, an Indian ragpicker smiles as she works in a garbage dump near Deepor Beel wildlife sanctuary on the outskirts of Gauhati, India, Wednesday, June 5, 2013. The World Environment Day is celebrated June 5 every year by the United Nations to stimulate global awareness on environmental issues. (AP Photo/Anupam Nath) ( India World Environment Day )

An Indian worker sorts defunct keyboards at Ash Recyclers, a government approved e-waste management firm in Bangalore on June 5, 2013, the World Environment Day. India sits on a huge mound of e-waste as annually an estimated 800,000 tons are generated giving a new dimension to the already difficult scenario of solid waste management in the country. According to senior scientist of the Ministry of Environment and Forest, NLNS Prasad, as many as 65 cities, headed by Mumbai, contribute more than 60 per cent of the total e-waste generated in the country. Manjunath Kiran/AFP/Getty Images ( 520310881 )

Indian women ragpickers search for recyclable materials in a garbage dump near Deepor Beel wildlife sanctuary on the outskirts of Gauhati, India, Wednesday, June 5, 2013. The World Environment Day is celebrated June 5 every year by the United Nations to stimulate global awareness on environmental issues. (AP Photo/Anupam Nath) ( India World Environment Day )

Cows relax at a 'gaushala' - cowpen - run by the Shree Vardhman Jivdaya Kendra charitable trust at village Luni of Mundra Taluka, some 415 kms from Ahmedabad on June 5, 2013, the World Environment Day. Housing some 1,000 cows, the centre prepares various medicines from cow urine and converts cow dung into biogas which is utilized at the centre. SAM PANTHAKY/AFP/Getty Images ( 520312602 )

Mongolian sheep and cattle graze at grasslands on World Environment Day at the Hustai National Park in Mongolia on June 5, 2013. The World Environment Day celebration began in 1972 by the United Nations and is used to raise worldwide awareness of the environment and encourage political attention and action. MARK RALSTON/AFP/Getty Images ( 520311063 )

Two-month-old orphaned baby elephant Ajabu is given a dust-bath in the red earth after being fed milk from a bottle by a keeper, as she is too young to do it herself, at an event to mark World Environment Day at the David Sheldrick Wildlife Trust Elephant Orphanage in Nairobi, Kenya, Wednesday, June 5, 2013. Trust founder Daphne Sheldrick said at the event, which was attended by U.S. Ambassador to Kenya Robert Godec, that they are seeing an upsurge in orphaned elephants because of the poaching crisis occurring across Africa. (AP Photo/Ben Curtis) ( APTOPIX Kenya Elephant Orphans )

A Mongolian herder with his flock of sheep, goats and cattle head towards grasslands on World Environment Day at the Hustai National Park in Mongolia on June 5, 2013. The World Environment Day celebration began in 1972 by the United Nations and is used to raise worldwide awareness of the environment and encourage political attention and action. MARK RALSTON/AFP/Getty Images ( 520311387 )

Pigs feed in a pond polluted with plastic and other garbage in Allahabad, India, Tuesday, June 4, 2013. The World Environment Day will be marked on Wednesday, June 5. (AP Photo/ Rajesh Kumar Singh) ( India World Environment Day )

An Indian washerman cleans clothes in the polluted Sabarmati River on World Environment Day, in Ahmadabad, India, Wednesday, June 5, 2013. World Environment Day is celebrated every year by the United Nations to stimulate global awareness on environmental issues. (AP Photo/Ajit Solanki) ( India World Environment Day )

A worker carries bags filled with algae while cleaning the polluted waters of river Sabarmati on World Environment Day in the western Indian city of Ahmedabad June 5, 2013. REUTERS/Amit Dave ( INDIA/ )

An Indian man searches for coins in the polluted waters of the Yamuna river in New Delhi on June 4, 2013 on the eve of World Environment Day. India's cities are becoming more polluted and unhealthy, according to a new survey published Monday showing growing concern about the impact of high economic growth on the environment. The Energy and Resources Institute (TERI) research group based in New Delhi questioned 4,039 people living in India's six biggest cities about their perceptions, opinions and awareness of the environment and green issues over the last five years. MANAN VATSYAYANA/AFP/Getty Images ( 520280938 )