Global warming is caused by an increase in the level of carbon dioxide gas in the atmosphere. how has this affected the world's oceans?
a. there is an overgrowth of algae.
b. the oceans are warming as a result of the excess carbon dioxide.
c. the oceans are absorbing the excess carbon, causing the oceans to become acidic.
d. the oceans reflect a great deal of the carbon dioxide gas back into the atmosphere.