How does the author feel about the evidence of climate change? 1. It's not enough yet. 2. It's irrelevant so far. 3. It's not very convincing. 4. It soon would become conclusive.

How does the author feel about the evidence of climate change? 1.  It's not enough yet. 2.  It's irrelevant so far. 3.  It's not very convincing. 4.  It soon would become conclusive.