I've seen argument and published studies against (1) so you're not off to a good start. These are clearly not points of view that would get 97% of economists agreeing on, are they?
Plenty of blogs say climate science is not a science. Climate scientists say otherwise.
Plenty of blogs say economics is not a science. Climate scientists say otherwise.
What exactly differentiates one statement from the other ? Aside from the fact that one is popular opinion and the other is not (although that's debatable and differs by person and by region).