Today, India’s environmental problems are among the grimmest in the world. They relate to raw sewage, waste and open defecation, which exacerbate childhood malnourishment, and cause diseases like hepatitis, cholera and typhoid fever. The air in the cities is so filthy from factories and cars that middle-class parents now check the levels of PM2.5, or airborne particulate matter, on their smartphones, as people in other places do the weather, before letting their children outside to play. Read more