Which statement best describes the life-cycle environmental implications of renewable and nonrenewable energy sources?

Which statement best describes the life-cycle environmental implications of renewable and nonrenewable energy sources?

• A. Renewable sources replenish naturally with low long-term emissions; nonrenewables deplete finite resources with higher emissions; lifecycle includes extraction, use, disposal.
• B. Renewable energy always has higher emissions than fossil fuels.
• C. Nonrenewables require no extraction costs.
• D. Lifecycle considerations only apply to renewables.

Answer: (A)

Lifecycle environmental impact looks at everything from resource extraction and manufacturing to operation, maintenance, and end-of-life disposal. Renewable energy sources replenish naturally, and when you consider the full life cycle, their long-term emissions are generally much lower than those of nonrenewables, which rely on finite resources and tend to have higher emissions across extraction, processing, and combustion. Even though renewables involve manufacturing and construction emissions, and some nonrenewables involve ongoing extraction costs, the overall life-cycle picture still favors renewables for lower long-term environmental impact. That’s why the statement that best fits is that renewables replenish naturally with low long-term emissions, nonrenewables deplete finite resources with higher emissions, and life-cycle considerations include extraction, use, and disposal. The other options misstate these points by claiming renewables always have higher emissions, asserting no extraction costs for nonrenewables, or suggesting lifecycle analysis applies only to renewables.

Lifecycle environmental impact looks at everything from resource extraction and manufacturing to operation, maintenance, and end-of-life disposal. Renewable energy sources replenish naturally, and when you consider the full life cycle, their long-term emissions are generally much lower than those of nonrenewables, which rely on finite resources and tend to have higher emissions across extraction, processing, and combustion. Even though renewables involve manufacturing and construction emissions, and some nonrenewables involve ongoing extraction costs, the overall life-cycle picture still favors renewables for lower long-term environmental impact. That’s why the statement that best fits is that renewables replenish naturally with low long-term emissions, nonrenewables deplete finite resources with higher emissions, and life-cycle considerations include extraction, use, and disposal. The other options misstate these points by claiming renewables always have higher emissions, asserting no extraction costs for nonrenewables, or suggesting lifecycle analysis applies only to renewables.