i really enjoyed (trembled through) this* special on ABC.com. if you have an hour and half and are concerned about the state of our earth you should check it out. disclaimer: i can't vouch for the complete accuracy of this information. it does seem like there are respected and wise voices speaking in it and that what they are proposing are reasonable, albeit difficult and honest, avenues of change.
*click on "this", click on free episodes, click on ABC News Specials, click on Earth 2100 part 1