Mohit, to address all those points would take a book

I think most of the responses you get will limit themselves to one or two of the points.
As Infi said, the resistance of the US government is not due to lack of intelligence, but greed. Oil companies in the 90s saw GW as a threat to their bottom line.
That is slowly starting to change. However, the political parties in the US made it a political issue and have entrenched their positions.
Some state governments have taken the lead and many people are doing what they can on an individual basis.
Funny thing is, as more companies see how wrong the predictions of being enviornmentally friendly causing huge loss of business and profit, more businesses are also picking up the slack.
As for the "health of the earth" I have no concerns about that what so ever. The earth will get along just fine no matter what we do.
I have great concerns for the health of our species as that is what is at risk.