It helped raise public awareness of the dangerous use of chemicals to kill insects and the pollution of the environment.

VOA: special.2010.12.15

The students use the mixture to fertilize the soil instead of buying chemical fertilizers that could harm the environment.

VOA: special.2009.04.14

But he says many parts of the world use too much nitrogen fertilizer, and that harms the environment.

VOA: special.2011.04.05

They teach the need for farming to improve the environment and make good use of natural resources.

VOA: special.2009.04.14

So,he says Americans must use their votes to elect officials for whom the environment is important.

VOA: special.2010.04.21

"And in order to produce feed, you need to use land,fertilizers and agrochemicals which,in turn, affect our environment."

VOA: standard.2010.06.04

A panel of 27 experts with the UN Environment Program looked through previous UN reports to assess what economic activities generate the most pollution and use the most resources.

VOA: standard.2010.06.04