Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[Q]: Question: In a heat map, what color represents the hottest temperatures? Answer: bright yellow
[A]: A heat wave over the United States as indicated by heat radiated from the ground. The bright yellow areas are the hottest, and the blue and white are coolest.

[Q]: Question: What do nonvascular plants reproduce with? Answer: spores
[A]: Nonvascular plants are low-growing, reproduce with spores, and need a moist habitat.

[Q]: Question: What gas is released into the atmosphere when fossil fuels are burned? Answer: co2
[A]:
Carbon dioxide levels in the atmosphere are increasing. Fossil fuel burning is increasing. The rise in fossil fuel burning is increasing the CO 2 in the atmosphere.