Use these in-depth research activities to help students understand the issues facing our planet. Want more free educator materials? Go to CNN Student News.
How much do you know about the issues that affect our planet's health? Take this quiz and find out.Take Quiz
The Earth goes through both warming and cooling periods, but since 1975, average temperatures have been rising.Watch Video
Deforestation in places like Brazil robs Earth of trees that pull carbon dioxide from the air.Watch Video
Endangered list of animals and plants is growing.Watch Video
Population growth is expected to be most significant in developing countries – places that struggle with basic needs.Watch Video Want more free educator materials? Go to CNN Student News.