It may look like a natural environment of lakes and woodlands, but it was entirely built by human labor.

VOA: special.2009.10.30

The pistons go up and down as a person stands on lever devices treadles and uses a natural walking motion.

VOA: special.2009.08.17

At first it might seem very unusual to see a natural form like a hill inside a museum.

VOA: special.2009.05.06

He and his crew put out a natural gas fire in the Sahara Desert in Algeria.

VOA: special.2009.03.22

The team was looking for a natural clock in the body that controls sleep and wakefulness.

VOA: special.2009.08.26

The bamboo is a natural product harvested in the states of Georgia and South Carolina.

VOA: special.2010.08.13

Organizers in Vancouver say the athletes will notice very little difference between a natural ski slope and the one that has been built for the games.

VOA: special.2010.02.10

Now,a winery in Canada has imported a natural way to control its grapevines.

VOA: special.2009.07.14

Another example of scientific progress involves a natural bacterium known as Bt.

VOA: special.2009.10.27

Dense planting of a crop can also act as a natural control.

VOA: special.2009.05.26

Farmers started using it as a natural way to kill insects.

VOA: special.2010.05.25

So this week, we describe a natural way to dye wool.

VOA: special.2010.08.02

A natural reaction kills harmful organisms in the waste.

VOA: special.2010.03.15

The trees surrounding Biltmore look like a natural forest.

VOA: special.2009.11.16