Ok so you obviously have spent plenty of time thinking about the subject, and you have not considered weather manipulation?
It is on the record that the HAARP facility manipulates the ionosphere. This is believed to change the jet streams and in turn change the weather on our planet.
Ignoring this and continuing your debate on the subject would be silly.
http://www.youtube.com/watch?v=ywPf0Z6vkR0
You could have an opinion that it is just a conspiracy theory?
But changing the ionosphere at all could affect the weather.
Nobody has the capacity to say it definitely couldn't.
I am unsure either way but anything is possible and any benefits of such technology are far out weighed by the potential ramifications. Playing god is not a very good idea.
No stupid, carbon is good, oxygen is good, carbon monoxide is no good.
If you produce carbon = good, if you produce oxygen = good but if you produce carbon monoxide = not good.
Pretty darned simple?