Enormous amounts of carbon are stored in fossil fuels. When humans burn fossil
fuels, large amounts of carbon dioxide are released rapidly into the atmosphere.
What is the main scientific concern about having too much carbon dioxide in the
atmosphere?
Warming of the climate
O Cooling of the climate
Too much oxygen

How are cellular respiration and photosynthesis different? cellular respiration assists breathing; photosynthesis aids pigmentation. cellular respiration breaks down glucose; photosynthesis creates glucose. cellular respiration creates glucose; photosynthesis breaks down glucose. cellular respiration releases oxygen; photosynthesis releases carbon dioxide.

In general, how long does it take to accomplish a long-term goal? a.a few days to a weekb.a few weeks to a monthc.a few months to a yeard. more than a year

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions