Guwahati

Indian Hindu devotees offer prayers during the 'Chhat Puja' on the banks of the Brahmaputra River in Guwahati on November 17, 2015. Devotees pay obeisance to both the rising and the setting sun during the Chhath Festival, expressing thanks and seeking the blessings of the forces of nature, mainly the sun and rivers.

Biju Boro/AFP

Indian Hindu devotees offer prayers during the ‘Chhat Puja’ on the banks of the Brahmaputra River in Guwahati on Tuesday. Devotees pay obeisance to both the rising and the setting sun during the Chhath Festival, expressing thanks and seeking the blessings of the forces of nature, mainly the sun and rivers

An Indian rag-picker looks for recyclable material in what is reportedly the largest rubbish tip in the state of Assam on the eve of World Environment Day in the Boragoan area of Guwahati on June 4, 2015.  World Environment Day is marked anually on June 5.

Biju Boro/AFP

An Indian rag-picker looks for recyclable material in what is reportedly the largest rubbish tip in the state of Assam on the eve of World Environment Day in the Boragoan area of Guwahati on Thursday

A rarely spotted single-tusk elephant, also called as Ganesh Elephant, at the Kaziranga National Park about 250km away from Guwahati city, India.

EPA

A rarely spotted single-tusk elephant, also known as a Ganesh Elephant, eats flowers at the Kaziranga national park in Assam, India.

A scavenger, surrounded by a flock of Greater Adjutant birds, collects plastic for recycling at a dump site on World Environment Day in the northeastern Indian city of Guwahati June 5, 2013.

Utpal Baruah/Reuters

A scavenger, surrounded by Greater Adjutant birds, collects plastic for recycling at a dump site in the northeastern Indian city of Guwahati on Wednesday, World Environment Day