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1) accommodation 2) variation 3) adaptation 4) selection **Chlorofluorocarbons (CFCs) are a problem because they 1)have been released in large quantities in the past 2)break down to reactive free chlorine atoms 3)attack ozone molecules in the upper atmosphere 4) all of the above

Question 9 2 points Save Acid rain is caused by ___________ and results in ____________. Question 9 answers chlorofluorocarbons from refrigerators; a decrease in the ozone layer. hydrochloric acid from power plants; "bleaching" lakes and trees. carbon dioxide air pollution; global warming...