The Earth's Average Temperature Appears to Be Slowly Increasing, and Heralds

question 71

Multiple Choice

The earth's average temperature appears to be slowly increasing, and heralds a new era in environmental challenges for numerous species. Most evidence supports the hypothesis that climatic change is the result of

• A) invasive species that disrupt ecosystem services.
• B) human activities that modify the atmosphere.
• C) the disappearance of key plant species that affect the water cycle.
• D) excess expansion of rainforests.