ach day, Kiran Kasbe drives a rickshaw taxi through his home neighbourhood of Mahul on Mumbais eastern seafront, down streets lined with stalls selling tomatoes, bottle gourds and aubergines–and, frequently, through thick smog. Earlier this year, doctors found three tumours in his 54 year old mothers brain. Its not clear exactly what caused her cancer. But people who live near coal plants are much more likely to develop the illness, studies show , and the residents of Mahul live a few hundred...
