Page 65 - Science Course 3 (Book 1)

Mo2-L3a: How Do Humans Affect Ecosystems?

Renewable resources Nonrenewable resources
are resources that can are natural resources that
be replenished by are used up faster than
natural processes at they can be replaced by
least as quickly as natural processes.
they are used.

The more people can learn about how their actions
affect the environment, the better their ability to
make good environmental choices in the future.

Carbon Chlorine

Any resource becomes nonrenewable if it is used up
faster than it can be replaced. Fluorine

Resource depletion—the exhaustion of one or more
resources in an area— is happening in the United The invention of chlorofluorocarbons, or CFCs, had
States and throughout the world.
the unintended consequence of damaging Earth’s
ozone layer.
China
60,000
tons Rest of
the world
52,000
tons

India
20,000 Russia
tons 18,000
tons
The water in the Ogallala Aquifer is pumped out
faster than it is replaced.
1996 CFC Production (by tons)

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