human
Question: This in turn causes the average temperature on Earth to rise. Which of the following observations supports that theory?

Choices:
A) The summer of 1998 was one of the hottest summer seasons on record.
B) Carbon dioxide gas from cars and industry is a product of burning that produces heat.
C) Carbon dioxide in the upper atmosphere absorbs and re-emits heat radiated from Earth's surface.
D) Radiation on Earth's surface is increasing because of a hole in the ozone layers.
gpt
The correct answer is 2: Carbon dioxide in the upper atmosphere absorbs and re-emits heat radiated from Earth's surface..