Unit Test Answers

Which is a cause of desertification?

Which human activity will most likely contribute to ozone layer destruction?

Which is an issue that governments must consider before passing conservation policies?

Which action has a positive effect on air resources?

Which two human activities are believed to be the greatest contributors to global warming?

Dan drew a diagram to compare the effects of human-induced environmental changes on organisms and species.

The Chesapeake Bay is an important natural resource. Over the years, the number of oysters in the bay has declined dramatically, largely because of fishers who catch them and sell them as food. This has affected many other organisms that depend on oysters.