At the foot of the Himalayas, in the city of Dehradun, India’s government is working on a jet fuel it hopes can help clean up the smog hanging over its big cities.
There — on a sprawling 120-hectare tea estate where leopards and deer can be spotted — scientists are working with partners including Boeing to get global approval for their biofuel, which is made from waste cooking oil and the seeds of plants such as pongamia and jatropha that aren’t consumed.
The project run by the Indian…