Neatly-stacked dried cow dung, hand-formed into pats to be used for fuel for cooking, at a farm in Agra, Uttar Pradesh, India

Neatly-stacked dried cow dung, hand-formed into pats to be used for fuel for cooking, at a farm in Agra, Uttar Pradesh, India

Indian woman in sari carrying cow dung pats to dry for cooking fuel at Khore village in Rajasthan, Northern India

Neatly-stacked dried cow dung, hand-formed into pats to be used for fuel for cooking, at a farm in Agra, Uttar Pradesh, India

Neatly-stacked dried cow dung, hand-formed into pats to be used for fuel for cooking, at a farm in Agra, Uttar Pradesh, India

Cow dung belonging to subsistence farmers in the Sunderbans, a low lying area of the Ganges Delta in Eastern India, that is very vulnerable to sea level rise. The cow dung is used as biofuel in traditional clay ovens.

Cow dung belonging to subsistence farmers in the Sunderbans, a low lying area of the Ganges Delta in Eastern India, that is very vulnerable to sea level rise. The cow dung is used as biofuel in traditional clay ovens.

Cow dung belonging to subsistence farmers in the Sundarbans, a low lying area of the Ganges Delta in Eastern India, that is very vulnerable to sea level rise. The cow dung is used as biofuel in traditional clay ovens