Which one of the following is least likely to be a viable response to stop global warming?

The response involving the rapid expansion of nuclear power generation is considered the least viable option to address global warming within the context of the multiple-choice question. While nuclear power does produce low greenhouse gas emissions and can provide a substantial amount of electricity without the carbon footprint associated with fossil fuels, its expansion faces significant challenges. These challenges include high initial capital costs, public concerns about safety, waste management issues, and long construction timelines for new plants. Additionally, the socio-political landscape surrounding nuclear energy varies greatly by region, which can impede rapid deployment.

On the other hand, improving engine efficiency, replanting deforested areas, and taxing fossil fuel use are more directly actionable and can lead to more immediate reductions in greenhouse gas emissions. Enhancing the efficiency of internal combustion engines can reduce fuel consumption, thereby decreasing carbon emissions from one of the largest sectors contributing to global warming. Replanting deforested areas helps to sequester carbon dioxide and restore natural carbon sinks. Taxing fossil fuels creates a financial disincentive to their use, encouraging a shift towards renewable energy sources and more sustainable practices, significantly contributing to efforts to combat climate change.

In summary, while nuclear energy could theoretically contribute to reducing global warming, the practical hurdles associated with its