Every year Yogesh Mudgal treks miles through the mountainous roads of the Indian Himalayas during the holy Hindu month of Shravan, in July.
For the past three months, a transport group in the Philippines has been making use of biodiesel processed from used cooking oil for their jeepneys.
"We are facing a very alarming situation, and solutions are urgently needed," said Cecilia Sepúlveda, the dean of the University of Chile medical school, after it was announced that 4,200 people a year in this country die from causes directly attributable to smog and other kinds of pollution.
Bisphenol A (BPA), a chemical found in strong plastics, is banned in baby bottles in Canada and the European Union. But Mexico has made no move to outlaw it from plastic bottles or the lining of food cans, despite the threat to health.
In a country which houses 21 of the world’s 100 most polluted cities, outcry over official underplaying of pollution is escalating as residents refuse to take government readings of the problem at face value.