12. Based on the reading passage, which county-wide policy would be most effective in reducing climate change?

Answer: C

Explanation:

Provide incentives for households that install solar or wind energy and reduce plastic consumption.

Incentivizing households to install solar or wind energy systems, along with reducing plastic consumption, directly addresses key contributors to climate change, such as greenhouse gas emissions from fossil fuels and the carbon footprint associated with plastic production.

A) Mandate the use of energy-efficient appliances in all commercial buildings.

While mandating energy-efficient appliances can help reduce energy consumption in commercial buildings, it does not address the broader issues of greenhouse gas emissions and carbon footprints as effectively as promoting renewable energy sources and reducing plastic use. This approach is limited to commercial sectors and may not impact residential energy use significantly.

B) Establish penalties for water usage over an established average level.

Establishing penalties for excessive water usage may help conserve water resources but does not have a direct correlation to reducing greenhouse gas emissions or addressing climate change. Water usage penalties primarily target water conservation rather than the critical areas of energy production and consumption that significantly influence climate change.

C) Provide incentives for households that install solar or wind energy and reduce plastic consumption.

This option promotes the adoption of renewable energy sources, which significantly decrease reliance on fossil fuels and hence reduce greenhouse gas emissions. Additionally, encouraging reductions in plastic consumption can lower carbon footprints associated with plastic production, making this policy a comprehensive approach to combating climate change.

D) Provide tax benefits for individuals who carpool and plant trees.

While tax benefits for carpooling can help reduce vehicle emissions and planting trees contributes to carbon sequestration, this option does not encompass the broader implications of transitioning to renewable energy sources or addressing plastic usage. It focuses on individual actions rather than systemic changes necessary for substantial climate impact.

Conclusion

Option C is the most effective policy for reducing climate change as it directly targets the two major contributors to greenhouse gas emissions: fossil fuel energy production and plastic usage. The other options, while beneficial in certain contexts, do not comprehensively address the urgent need for systemic change and have limited impacts on overall climate change mitigation.