Which practice can reduce a carbon footprint?

• A. Efficiency, renewables, and changes in behavior.
• B. Building more power plants.
• C. Dismantling energy efficiency measures.
• D. Increasing energy usage.

Answer: (A)

Reducing a carbon footprint comes from using energy more efficiently, switching to renewable energy sources, and adopting everyday habits that limit energy use. The best answer combines all three: improving efficiency lowers the amount of energy we need for the same tasks, renewables replace fossil fuels in power generation, and behavior changes—like using public transit, turning off lights, or reducing hot water use—further cut demand and emissions.

Building more power plants often means more energy produced, and many plants run on fossil fuels, which can increase emissions rather than reduce them. Dismantling energy efficiency measures makes it easier to waste energy, raising the footprint. Increasing energy usage directly boosts emissions. So the combination of efficiency, renewables, and behavior changes is the most effective path to lowering carbon footprint.