I can see a day soon when unmanned aerial vehicles will fly around the sky collecting the carbon out of it in order to help clean the air. And the unmanned aerial vehicles will run off batteries that recharge using solar power and flutter technology because as technology grows faster and smaller and more energy efficient systems are created we will soon be able to fly these type of machines in the air via GPS guided routes that just do nothing all day but clean the air we breathe.
There are probably dozens of different activities an unmanned machine could do all day to help mankind and the above idea is just the tip of the ice berg as to what machines can do to better mans life here on earth. If you have any ideas please leave them in the comments, because I would love to read them!