They don't need to spend money. Allow tax credits and shrink big government. If you can think of a similar way of addressing defense i'd be all for it.
Your post is a typical tactic of the left. We're talking about climate change and big government and you deflect and build a strawman about defense spending. Criticizing one thing the government does doesn't then mean you agree with everything else they do. Do you at least see the point I'm making? We don't need to expand the government to protect the environment.