Sorry, I can't this ignorant crap be posted without posting the truth, by someone who worked on the Shuttle lauches.
1. NASA missions are timed to heavenly body locations and technical and construction capabilities and money - often years in advance, so that often very small windows of a few days or even in some cases a few hours, can be met. And it is really tough to meet those schedules, let alone to schedule for politics.
2. As for global warming, NASA has been the one who has been saying for the last several years, they find no evidence of global warming from their satelites. The global warming crowd has gotten it's data from ground temperature stations, which once were out in the country, and which now, because of population growth, are in the city.
NASA does need conogressional support though, and has stupidly spread design and construction jobs around the country to garner congressional support, and as such has wasted a tremendous amount of money building a space station which is years and years late and so far under initial concept capabilities that it is essentially worthless.