Empirical Evidence Indicates That

Multiple Choice

Empirical evidence indicates that

A) changes in the earth's cloud cover will clearly enhance the warming effects of carbon dioxide.
B) the increase in carbon dioxide, over thousands of years, is clearly the cause of global warming.
C) if global warming continues for another century, as most models forecast, the sea levels will clearly rise substantially, imposing costs much larger than the cost of preventing the warming.
D) the earth has warmed a little more than one degree Fahrenheit in the past century.