![]() ![]() ![]() 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. ![]() ![]() ![]() ![]() The Earth goes through both warming and cooling periods, but since 1975, average temperatures have been rising. ![]() ![]() ![]() Deforestation in places like Brazil robs Earth of trees that pull carbon dioxide from the air. ![]() ![]() ![]() Endangered list of animals and plants is growing. ![]() ![]() ![]() Population growth is expected to be most significant in developing countries – places that struggle with basic needs. ![]() ![]() |