Scott Seidman wrote:
The answer is, of course, no. The same bunch of scientists who are
suggesting we need to change our lifestyles to counter global warming are
unwilling to put a firm estimate on how much our lifestyles contribute to
global warming.

More unable than unwilling, I imagine. So the crystal ball isn't
perfect, it's still better to do something than nothing. Reducing
greenhouse gases certainly won't make the problem worse but it
might make the situation a little better.

--
Ken Fortenberry