We now know that the warming of the Earth in the last 200 years is largely due to humans and their effects on:

Question

Quizplus · Accepted Answer

The best choice is B because atmospheric carbon dioxide is a greenhouse gas that traps heat in the Earth's atmosphere, leading to global warming. Humans have been releasing large amounts of carbon dioxide, primarily through burning fossil fuels, deforestation and other land-use change. This has greatly contributed to the warming of the Earth in the last 200 years. Options A, C, and D are environmental pollutants but they do not contribute significantly to the warming of the Earth. Therefore, the correct answer is B.

We Now Know That the Warming of the Earth in the Last