Question

question: which of the following make(s) up a synthetic greenhouse gas? answer options: select one of four chlorofluorocarbons carbon dioxide ozone water vapor

Explanation:

To determine the synthetic greenhouse gas, we analyze each option:

• Chlorofluorocarbons (CFCs) are man - made (synthetic) compounds that act as greenhouse gases.
• Carbon dioxide is a naturally occurring greenhouse gas (though human activities increase its levels, it is not synthetic in the sense of being entirely man - made like CFCs).
• Ozone is a naturally occurring gas in the atmosphere (with some human - related changes, but not a synthetic greenhouse gas in the typical sense).
• Water vapor is a naturally occurring greenhouse gas.

Answer:

A. Chlorofluorocarbons