We won't have to worry about Global Warming for much longer, there's a solution coming.
When our Hard disk gets filled with garbage and the system doesn't work properly, what do we do? We reformat it; the same is going to happen to us. Our planet is ridden with too much garbage right now and it needs to be cleaned.
Now a days we are always hearing of too many objects that are flying past our planet and their numbers are increasing day by day. This is just the warning for us. One will hit us very soon if don't heed and we will be able to do nothing.
It will come with such a force that any kind of deterrent will not work, we will not be able to change its course.
And for blasting it, that will also be not possible, nothing on the Earth will be able to harm it.
It will also be a targeted attack, i.e. it will mostly affect the Humans.
Though its a little bit difficult to believe but its true as it has happened in the past also. All the ancient texts describe these kinds of events and we ourselves have found out what happened to the Dinosaurs.
But there's one thing to be noted, whenever Humanity has been in danger some one has been sent here to help them, and this will defninitely happen again.