i believe that this is going to happen sooner or later probably sooner than later. When it does its going to be bad. People need to start being more efficient in everyday living. Driving less consuming less wasting less. Recycle, do anything that you can think of to make the enviorment a better place. cut down on our emissions. It might seem like you are not doing much but you are and you are making a diffrence. I hope scientists come out with some new technology that can make a bigger diffrence. Recycle.