Câu 20: SCR: Sustainability and Climate Risk

A climate scientist develops a presentation on modern climate change for a group of policymakers. What observation does the scientist include in the presentation that provides evidence of human attribution to current climate change?

1. A. Atmospheric CO2 with isotopes consistent with fossil fuel emissions have increased since the mid-20th century. — đáp án hiện tại
2. B. Glacial ice records indicate atmospheric CO2 increased by 135 parts per thousand since the Industrial Revolution.
3. C. In the past 200 years, CO2 is responsible for most negative radiative forcing.
4. D. In the past 100 years, the atmospheric lifetime of CO2 attributed to energy use increased.