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
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