Question

15 multiple choice 1 point
which of the following is a human cause of global warming that leads to climate change?
photosynthesis and cellular respiration cycling carbon dioxide and glucose
decomposition and fertilizer adding usable nitrogen to the soil
burning of fossil fuels and deforestation increases carbon dioxide in the atmosphere
acid rain and water pollution released by factories

Explanation:

• Photosynthesis/respiration are natural carbon cycles, not human-caused.
• Decomposition/fertilizer nitrogen cycling is mostly natural or agricultural but not a direct global warming driver.
• Burning fossil fuels and deforestation are human activities that directly increase atmospheric CO₂, a major greenhouse gas causing global warming and climate change.
• Acid rain/water pollution are industrial byproducts but not direct causes of global warming.

Answer:

burning of fossil fuels and deforestation increases carbon dioxide in the atmosphere