I'd like to bring two points to your attention.
First, the working interpretation of the departments is that “air pollution” is broad enough to cover the effects on climate of both air pollutants like smog, etc., and greenhouse gas. So like the previous one, I would ask you to think about whether this is potentially redundant.
Second, certainly the departments are focusing their work on more than global warming. We're focusing on the effects of climate change, of which global warming is just one of the potential concerns.