Question

which human activity contributes most to the increase in atmospheric co2? using energy-efficient appliances recycling waste that is produced burning of fossil fuels for energy

Explanation:

To determine the human activity that contributes most to atmospheric CO₂ increase, we analyze each option:

• "Using energy - efficient appliances" reduces energy consumption and thus CO₂ emissions, so it does not increase CO₂.
• "Recycling waste that is produced" helps in resource conservation and waste management, and it does not contribute to an increase in atmospheric CO₂.
• "Burning of fossil fuels for energy" (such as coal, oil, and natural gas) releases large amounts of CO₂ into the atmosphere. This is a major source of anthropogenic CO₂ emissions.

Answer:

C. burning of fossil fuels for energy (assuming the options are labeled A, B, C with A: using energy - efficient appliances, B: recycling waste that is produced, C: burning of fossil fuels for energy)