ENVIRONMENT 'Final Warning To Humanity'

"[T]he world's scientists have spoken, clearly and in one voice," said U.N. Secretary General Ban Ki-moon, on the most recent report of the Nobel Prize-winning Intergovernmental Panel on Climate Change (IPCC). After a rigorous multi-stage review process that includes 2,500 scientific expert reviewers, 800 contributing authors, and 450 lead authors representing 130 countries, the IPCC warns that "all countries" will be affected by climate change if carbon emissions continue to spiral.

By 2100, global average surface temperatures could rise by between 1.1 and 6.4 degrees celsius, and carbon dioxide in the atmosphere could lead to an eventual rise in sea levels of up to 1.40 meters.

With "strikingly" blunt language, the report reads like "a final warning to humanity," notes Time magazine. "What we do in the next two to three years will determine our future. This is the defining moment," declared IPCC chairman Dr. Rajendra Pachauri.

DEBATING WAYS TO BATTLE WARMING: This weekend, Grist and Living on Earth sponsored a presidential candidate forum to discuss ways to tackle climate change, in partnership with the League of Conservation Voters Education Fund, California LCVEF, Center for American Progress Action Fund, Natural Resources Defense Council Action Fund, and the Presidential Forum on Renewable Energy.

The event was attended by Sen. Hillary Clinton (D-NY), former senator John Edwards, and Rep. Dennis Kucinich (D-OH). "[R]educing oil dependence and global warming is the second most important issue among independent voters," states Daniel Weiss of the Center for American Progress.

With "little disagreement among them" on the urgency of climate change, Clinton and Edwards emphasized the need to reduce emissions by 80 percent by 2050, consistent with the goals of the IPCC, along with a mandatory cap on greenhouse emissions. Such plans to combat global warming can be undertaken with a very modest reduction in global annual GDP growth of 0.12 percent, notes Pachauri.

Scientists Detail Climate Changes

By James Kanter and Andrew C. Revkin

The New York Times
Saturday 07 April 2007

Poles to Tropics

BRUSSELS, April 6 — From the poles to the tropics, the earth’s climate and ecosystems are already being shaped by the atmospheric buildup of greenhouse gases and face inevitable, possibly profound, alteration, the world’s leading scientific panel on climate change said Friday.

In its most detailed portrait of the effects of climate change driven by human activities, the panel predicted widening droughts in southern Europe and the Middle East, sub-Saharan Africa, the American Southwest and Mexico, and flooding that could imperil low-lying islands and the crowded river deltas of southern Asia. It stressed that many of the regions facing the greatest risks were among the world’s poorest.

And it said that while limits on smokestack and tailpipe emissions could lower the long-term risks, vulnerable regions must adjust promptly to shifting weather patterns, climatic and coastal hazards, and rising seas.

Without such adaptations, it said, a rise of 3 to 5 degrees Fahrenheit over the next century could lead to the inundation of coasts and islands inhabited by hundreds of millions of people. But if steady investments are made in seawalls and other coastal protections, vulnerability could be sharply reduced.

The group, the United Nations’ Intergovernmental Panel on Climate Change, also noted that the climate shifts would benefit some regions — leading to more rainfall and longer growing seasons in high latitudes, open Arctic seaways and fewer deaths from the cold.

The 1,572-page report, finished here on Friday, was prepared by more than 200 scientists, and a 21-page summary was endorsed by officials from more than 120 countries, including the United States.