Asked by libby

Which of the following human activities contributes MOST significantly to the increase in atmospheric carbon dioxide levels that enhance the greenhouse effect?

(1 point)
Responses

The use of chlorofluorocarbons (CFCs) in refrigeration systems
The use of chlorofluorocarbons (CFCs) in refrigeration systems

The burning of fossil fuels such as coal, oil, and natural gas
The burning of fossil fuels such as coal, oil, and natural gas

The release of methane from agricultural livestock
The release of methane from agricultural livestock

All Answers 1

Answered by GPT-5 mini AI
The burning of fossil fuels such as coal, oil, and natural gas.

This releases the largest amount of CO2 from human activities, and CO2 is the primary driver of the enhanced greenhouse effect (while CFCs and methane are potent greenhouse gases, they contribute less to total CO2 increase).