Question

On the whole, american politicians have been least willing to ________ in order to combat global warming. quiuzlet

Answer 1

American politicians have been least willing to "reduce carbon emissions". 

Carbon dioxide or (CO2) is a gas which has no color or odor, produced when the human being breath, and there are other ways also, it is not poisonous, its emission means the release of this gas which is also known as  greenhouse gas into air at various times.