Question

complete the sentences to explain why scientists were concerned about the use of c
uvc waves break down chlorofluorocarbons in the stratospher
amount of chlorofluorocarbons in the stratosphere increases, the number of ozor
molecules will. as a result, uv waves can pass through
ozone layer and reach earths surface.

Explanation:

Chlorofluorocarbons (CFCs) react with ozone in the stratosphere. When CFCs break - down, they release chlorine atoms which catalytically destroy ozone molecules. As the amount of CFCs increases, more ozone is destroyed. With less ozone, more UV waves, especially harmful UVB and UVC (though most UVC is already blocked by the atmosphere under normal conditions), can reach the Earth's surface.

Answer:

1. decrease
2. more