The "living planet report" highlights the pressure we're putting on the planet and the consequent decline in the resources that makes our lives possible.
The "living planet index" show 28% global decline in biodiversity health since 1970.
The earth is taking 1.5 years to fully regenerate the renewable resources that people are using in a single year. We are using 50% more resources that the Earth can provide, and unless we change course that number will grow very fast - by 2030 even two planets will not be enough.
Complete living planet report: http://wwf.panda.org/about_our_earth/all_publications/living_planet_report/