For an ecosystem to be classified as a forest, more than of the land must be covered by trees.
50 percent
10 percent
20 percent
90 percent

Read the article titled "greening the globe." according to the section titled “the contention,” the debate over climate change has two basic camps of thought. identify these two camps and their beliefs. give examples of who supports each one and explain what evidence they use to support their arguments. based on these arguments, which way of thinking do you agree with and why?

True or false. epeirogenic changes deform the crust.

Ascientist makes a map using gis. one layer is an aerial photograph of farmland. other layers show water level changes and how crop cover has changed over time. what might the scientist be studying?