Air pollution in Los Angeles in a nonpoint source.

A(n) environmental resource occurs naturally in the environment and is used by people.

The contamination of Earth's land, water, or air is called pollution.

Decisions about how to protect Earth's atmosphere are made on a local level.

Data provided by environmental scientists are part of what decision-makers consider when resolving an environmental issue.

When a population grows, the demand for resources ____________.

Three general categories of environmental issues are related to pollution, resource use, and ___________.

_________ of an environmental proposal are often economic.

____________ can be grouped in two categories, point source and nonpoint source.