November 29, 2015

Homework Help: last science check

Posted by me on Monday, May 26, 2014 at 4:47pm.

6. Which of the following pairs of words correctly completes the blanks in the sentence below? Depletion of_____ has been halted by a ban on the manufacturing of____ ..

the ozone layer, chlorofluorocarbons.
acid rain, carbon dioxide.
fossil fuels, gasoline.
global warming, methane***?

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