Some man-made materials are not ___. They can take years to break down.
Scientists think that polar ice caps are melting at an ever-increasing rate because of
I want a car that ___ less gas because gas prices are rising!
Many fish are dying because of the ___ that factories dump into rivers every day.
Garbage that isn't recycled ends up in a
If we continue to use our ___, like oil and coal, they might run out.
Scientists have been working on ___ transportation, like hybrid cars, to cut down on pollution.
Due to the lack of rain, we are experiencing a
drought
toxic chemicals
consumes
environment-friendly
global warming
natural resourses
biodegradable
landfill
