Question

how do biofuel production and use contribute to climate change?
photosynthesis removes more carbon dioxide from the environment than is added through burning biofuels.
photosynthesis removes carbon dioxide from the air.
burning biofuels adds additional carbon dioxide to the air.
burning biofuels adds more carbon dioxide to the environment than photosynthesis removes.
together, biofuel production and use are carbon - neutral.

Explanation:

Biofuels are derived from plants, which absorb CO₂ via photosynthesis during growth. However, burning biofuels releases CO₂, and when considering full lifecycle emissions (e.g., land use change, farming inputs), the CO₂ added by burning exceeds the CO₂ removed by photosynthesis, contributing to climate change. Other options are incorrect: A claims net removal (opposite of reality), B is true but doesn’t explain contribution to climate change, C ignores lifecycle balance, E is incorrect as biofuels are not fully carbon-neutral.

Answer:

Burning biofuels adds more carbon dioxide to the environment than photosynthesis removes.