SAT English Practice Question

The text states that "the most common way to reduce carbon emissions is to reduce the use of fossil fuels." The text also states that "the use of fossil fuels is responsible for the vast majority of greenhouse gas emissions." What is the main idea of this passage?

1. A.reducing carbon emissions is difficult due to the prevalence of fossil fuel use.
2. B.reducing carbon emissions is critical to addressing the issue of climate change.
3. C.fossil fuels are the only energy source that produces greenhouse gas emissions.
4. D.fossil fuels are a renewable energy source that needs to be used more responsibly.