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Debate: What Good Are Planetary Boundaries?

Nature Conservancy - Science

in Nature (“ A safe operating space for humanity “) that first broached numerical thresholds for nine “planetary boundaries” — categories of human-nature interaction ranging from climate change to land system change, rate of biodiversity loss to ozone depletion. “To provide electricity to everyone would only increase CO2 emissions by 1 percent. “If we do pass some limit, like 350 [parts per million CO2] — what do we do?”

Over Polluted Qatar Hosts UN Climate Conference

Green Prophet

This month’s United Nations Climate Change Conference (COP18) will be hosted by Qatar, the tiny peninsula nation in the Persian Gulf that holds the world record for per capita CO2 emissions. According to a report entitled Indicators of Sustainable Development 2011 released by Qatar’s statistics’ authority, the state has experienced a 27% annual increase in ozone-depleting substances, 9.3% increase in carbon dioxide (CO2).

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G8 Recognizes Need to Act on Super Greenhouse Gases, Considers More Aggressive Stance on CO2

Green (Living) Review

July 2009 – As the Group of Eight began discussions on targets for reducing climate emissions, talk was circulating of a possible commitment to limit warming to 2?C. The only way to meet these goals however, will be to pursue fast and big cuts in both CO2 emissions, which are causing half of the warming, and non-CO2 emissions which are causing the other half. C scenario to stabilize CO2 at 450 ppm. Washington, D.C.,

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Non-CO2 Pollutants Are Promising Target in Cancun, Could Delay Warming by Several Decades

Green (Living) Review

The scientific case for such a strategy was laid out today, on the eve of the UN climate negotiations in Cancun, in an Op Ed in The New York Times ( [link] ) by Professor Veerabhadran Ramanathan, from the Scripps Institution of Oceanography at the University of California, San Diego, and his colleague, Professor David Victor. Among the non-CO 2 pollutants are hydrofluorocarbons (HFCs), methane, tropospheric ozone, and black carbon soot.

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Runaway Warming Ahead, According to Ancient Climate Records

Green (Living) Review

They complement efforts to cut CO2 under any climate treaty. F) when concentrations of CO2 were at the levels that will be reached by 2100 under business-as-usual trends. Current emissions have warmed the Planet about 0.76?C. Molina’s fast-action strategies recognize that climate change is not one problem but a package of related problems, caused by a variety of factors. Downstream emissions of HFCs are included in the Kyoto Protocol.)

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