The introduction of contaminants into an environment that causes harm to human health, other living organisms and the environment is called

noise and light can be considered pollution

Which is NOT a form of natural air pollutants?

the cloud of smog that can be seen coming from a factory goes

__________ is crucial to every living thing on earth

What is not an effect of chemicals entering the water?

The most obvious form of pollution that we can see

waste that can corrode, catch fire, explode, or make people sick are called

The average american throws away about ____ pounds of garbage per week

This country throws away more garbage than any country in the world

People living in big cities may not be able to see stars at night because of

which of these is considered a renewable resource?

Today there are about ___ billion people living on Earth

Experts estimate that by 2050 there may be as many as ___ billion people living on Earth

Every habitat has several types of plants, animals, and organisms that within it. This is called ...

clear cutting a forest to build new homes for people is an example of

removing all of the trees from an area is called

The extracting of valuable minerals or other geological materials from the earth is called

the careful utilization of Earth's Natural resources in order to prevent them from being used up forever is called

which of these is not one of the three ways we can conserve resources

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