Your Friend Is Wary of Environmentalists' Claims That Global Climate

Multiple Choice

Your friend is wary of environmentalists' claims that global climate change could lead to major biological change on Earth. Which of the following statements can you use in response to your friend's suspicions?

A) We know that atmospheric carbon dioxide has decreased over the past 170 years.
B) Through measurements and observations, we know that carbon dioxide levels and temperature fluctuations are indirectly correlated.
C) Global temperature changes are rising in all locations on the planet.
D) Scientist have recent evidence that climate change has severely degraded up to 2/3 of the Great Barrier Reef.