India will ban trucks and buses more than 15 years old to curb record pollution levels, the government says. India’s capital, Delhi, is experiencing hazardous levels of pollution due to diesel emissions, construction dirt and the burning of crop stubble in farms around the city. Air pollution causes more than 600,000 premature deaths in India each year. India has 13 of the world’s 20 most polluted cities, the World Health Organization (WHO) reported last year.…