What is one disadvantage of using solar energy? A. Solar energy produces greenhouse gases.
B. Solar panels are very inexpensive.
C. Solar energy is available only in the summer.
D. Solar panels work well only in sunny areas.

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

How is the carbon cycle related to global warming ?

9. the history of life on earth is recorded in