Discusses causes of extinction including global warming, pollution and human overpopulation.
Watch this presentation on how wildlife, particularly the checkerspot butterfly, respond to climate change.
Reviews causes of extinction including global warming, pollution, and human overpopulation.
Come up with questions about a topic and learn new vocabulary words to determine answers using an Ask, Answer, Learn table.
Find out the whole story on ecosystems and invasive species. It probably isn't what you think.
Describes the possible impact of human activity on the earth's ecosystem.