cooking

An Indian woman carries cow dung to prepare cow dung cake on the outskirts of Allahabad, India, Wednesday, Oct. 22, 2014. Cow dung cakes are popularly used as fuel for cooking in rural India.

Rajesh Kumar Singh/AP

An Indian woman carries cow dung to prepare cow dung cake on the outskirts of Allahabad, India on Wednesday. Cow dung cakes are popularly used as fuel for cooking in rural areas

Aisha carries coal to be used for cooking and heating from a brick-making factory in Jalalabad...Aisha 11, carries coal to be used for cooking and heating from a brick-making factory in Jalalabad December 17, 2013.

Parwiz/Reuters

Aisha 11, carries coal to be used for cooking and heating from a brick-making factory in Jalalabad, Afghanistan