However,Tata company officials say the Nano will produce less pollution than any other car in the country.

VOA: special.2009.03.28

Other threats include human pollution, acidification from carbon dioxide and rising temperatures in Earth's atmosphere.

VOA: special.2009.05.12

Other places are slowly being damaged by pollution and careless visitors.

VOA: special.2009.04.22

"At a per-passenger-mile basis, rail is about three times as efficient as travel by car, in terms of fuel efficiency, and six times as efficient as travel by air, so there are pretty substantial pollution reduction benefits both in terms of greenhouse gases and other pollutants."

VOA: standard.2010.02.15