What is meant by "uncomfortable truth" in paragraph 4? 1. World financial crisis. 2. Scientific reports on climate. 3. Evidence of man-⁠made climate change. 4. People's personal beliefs.

What is meant by "uncomfortable truth" in paragraph 4? 1.  World financial crisis. 2.  Scientific reports on climate. 3.  Evidence of man-⁠made climate change. 4.  People's personal beliefs.