Two of the three are correct. Two of the three are correct. Only one of these is in the top three. Because the value is so low, the burning of fossil fuels has had a significant impact on the total carbon dioxide in the atmosphere. This alarming increase has already been linked to a measured average temperature increase on earth over the last 50 years of about 0.5 o .
Chlorofluorocarbons cause ozone depletion and are minor greenhouse gases.
The reaction for this question will be used for questions 1 - 4. Write a balanced chemical equation for the reaction of hydrogen with oxygen to give water. L None of the previous answers. The reaction for this question will be used for questions 4 - 7. L None of the previous answers.