The Pentagon seems to be making reality-based plans.
War is a facts and figures business. Business is a facts and figures business too. Insurance companies can put exact price tags on the costs of global warming. Eventually the market will insist that the government take action.
Which is to say...right now Our Corporate Overlords™ are preventing much government action on climate mitigation because there are still profits to be made. When climate mitigation is required to maintain profits then climate mitigation will occur.
Politics isn't based on facts and figures. The winners of our elections aren't necessarily the ones with the most votes...
"Be yourself; everyone else is already taken."— Oscar Wilde