There was a really good article by Roy Scranton in the New York Times on Sunday on the future challenges of the planet and the notion of the Anthropocene. This quote gives a good sense of the article (which can be found here):
The greatest challenge the Anthropocene poses may be to our sense of what it means to be human. Within 100 years — within three to five generations — we will face average temperatures 7 degrees Fahrenheit higher than today, rising seas at least three to 10 feet higher, and worldwide shifts in crop belts, growing seasons and population centers. Within a thousand years, unless we stop emitting greenhouse gases wholesale right now, humans will be living in a climate the Earth hasn’t seen since the Pliocene, three million years ago, when oceans were 75 feet higher than they are today. We face the imminent collapse of the agricultural, shipping and energy networks upon which the global economy depends, a large-scale die-off in the biosphere that’s already well on its way, and our own possible extinction.
I know the topic is a bit gloomy, but it needs to be said.