The color green is natural for trees and grass.

VOA: special.2009.11.15

Irons is part of a team with the Illinois Natural History Survey.

VOA: standard.2010.07.20

I'm Faith Lapidus. One of the world's great natural wonders is in the state of New Mexico, in the American Southwest.

VOA: special.2010.01.04

Jane Goodall has said that it is often easy to feel upset about the destruction of the natural world.

VOA: special.2009.11.18

Its aim is to guide the country's environmental policies and future laws to protect natural resources and ensure safe economic development.

VOA: special.2010.04.21

The Forest Service is protecting the area from too much human activity so it will return to its natural wild condition.

VOA: special.2009.07.20

It is housed at the Carnegie Museum, which has both an art museum and a museum of natural history.

VOA: special.2009.07.13

One sign of hope is a new way to make the natural defenses of mosquitoes resistant to the Plasmodium parasite.

VOA: special.2010.04.20

Natural gas is considered the cleanest of the fossil fuels, the fuels created by plant and animal remains over millions of years.

VOA: special.2009.10.23

The image in the flame is a hand and off of each fingertip are different natural healing techniques.

VOA: special.2009.09.16

"There is something about that stretch that made me feel so much more vulnerable and susceptible and exposed to the natural conditions.

VOA: special.2011.03.23

White Sands National Monument is just one of the more unusual examples of America's natural and cultural treasures.

VOA: special.2010.01.04

Rachel Carsons voice is alive in her writings that express the wonder and beauty of the natural world.

VOA: special.2010.03.14

Arkansas is rich in natural resources and has become a favorite place for older people to retire.

VOA: special.2009.08.02