You are a climate scientist who wants to investigate climate change. Which of the following measurements would be the least useful?
A. rainfall in the southeastern United States from 20 years ago to the present day
B. a long-term (30-year) study of coral biodiversity in the Australian reef ecosystem
C. changes in carbon dioxide (CO2) emission levels in China from 25 years ago to the present day
D. methane (CH4) levels from dairy farms in Iowa during the years 2011 and 2012
Answer:D
You are a climate scientist who wants to investigate climate change. Which of the following measurements would be the least useful?
A. rainfall in the southeastern United States from 20 years ago to the present day B. a long-term (30-year) study of coral biodiversity in the Australian reef ecosystem C. changes in carbon dioxide (CO2) emission levels in China from 25 years ago to the present day D. methane (CH4) levels from dairy farms in Iowa during the years 2011 and 2012