What the heck. I -- of course there's a lot -- look, global warming needs to be taken very seriously, and I take it seriously. But science, there's a lot -- there's differing opinions. And before we react, I think it's best to have the full accounting, full understanding of what's taking place.

Can we draw the following conclusion?
we need to fully understand whats taking place before taking 

Choose from:
1). Yes;
2). It's impossible to say;
3). No;