Obama's science advisor has stated publicly that he thinks the idea of geo-engineering is the way to hold off global warming (here). I find this idea interesting. I love technology. I love God's creation. But, I am unconvinced about global warming. I've yet to see any good data supporting real warming over any extended amount of time that doesn't mimic natural patterns in the past. If you are aware of this data please leave a link in the comment section!!
The basic idea that Obama's science advisor suggests is that we should use technology to stave off the radical global warming that "could be approaching" (his words in the article). Holdren's idea includes creating a device which would launch particles into the upper atmosphere much like a volcano. To be fair, it is widely accepted that a volcanic eruption was in large part the cause of the "Little Ice Age" (data here). However Holdren himself notes that the effects of such a device are unknown.
Anyone who has read even a little bit about Chaos theory (a good book here, and article here) knows that a complex system with many variables is basically impossible to predict. This is because the same patterns can be caused by different sets of variables. So, scientists really don't know what the effect of this device might be, but Holgren is ready to say that he thinks it is the best bet in the fight against what might be catastrophic global warming.
I would rather see our nation (and Christians in particular) embrace a lifestyle that uses the fewest resources possible, causing the least pollution possible, and only leaving a mark upon human culture, not a scar in the land.