Pollution can take many forms.
Air, water, solid waste - most agree that pollution is harmful for people and other life on Earth. But more controversial is how to best prevent it - and clean it up.
Alarmed by the country's appalling environmental problems, the government is trying hard to clean up. Coal has been a major polluter, not only for steel production, but also for the basics of life at village level. Now China is converting to gas, just in time for winter
India’s capital, New Delhi, is one of the world’s most polluted cities. The air has been at its worst this week this year – spiking to 75 times the levels considered safe by the World Health Organization. Some experts have compared the toxicity level to smoking a couple of packs of cigarettes a day.
A cloud of radioactive pollution over Europe in recent weeks was likely from a nuclear facility in Russia or Kazakhstan. The French nuclear safety institute IRSN said the leak took place in the last week of September.