World GDP | International Monetery Fund

Living planet index | WWF

Humanity's ecological footprint | WWF

Atmospheric CO2 | CO2Now.org (Data from NOAA / Scripps)

Ultimate objective to stabilize atmospheric greenhouse gases | UNFCCC Article 2

First media article about 350 | Washtington Post

Bill McKibben calls 350 "the most important number" on Earth | LA Times

Science of 350 as humanity's target for atmospheric CO2 | Hansen et al

Look Who's Saying "350":

• James Hansen, Chief Climatologist, NASA Goddard Institute for Space Studies | 350.org
• Bill McKibben, Author and Co-founder of 350.org | 350.org
• Desmond Tutu, Archbishop Emeritus | 350.org
• Barbara Kingsolver, Author | 350.org
• David Suzuki, Science Broadcaster | 350.org
• Hermann Scheer, German Parliamentarian | 350.org
• 49 'Least Developed Countries' | 350.org
• Al Gore Talks 350 in Poznan | AlGore.com

Arctice sea will be ice free in the summers starting in 5 to 13 years | Various Scientific Institutions

Prerequisites for getting atmospheric CO2 to stop rising | IPCC

Prerequisites for getting from "peak CO2" to 350 ppm | Hansen et al; Also see the IPCC (above)