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I've got another guest post from Neil Howes up at TOD, this one proposing a rough plan for North AMerica to obtain 50% of its power from wind by 2030 - A North American Wind Energy Scenario. Would a "50% of electricity generated by wind scenario" work in North America by 2030? In this post, I make a rough cut estimate of what might be required to make such a transition in about 20 years time. Most proposals that are being made rely on a very big increase in carbon free energy, both to charge electric vehicles (EV's) and to replace oil and natural gas (NG) presently used for hot water and space heating. In this post, I lay out a path by which 50% of North American energy might come from wind by 2030, including replacement of a large share of oil and natural gas use by electricity. ... High quality wind resources (wind speeds greater than 6.9m/sec) in the US are estimated to be >5,500GWa, about x10 all of N America's present electricity production of 550GWa. Canada's potential appears to be similar or greater than the US, while Mexico's wind resources are more limited (these figures do not include deep offshore resources that could be harnessed by floating wind turbines or higher altitude wind resources that could potentially be harnessed by airborne wind turbines).

A young Google executive who helped ignite Egypt's uprising energized a cheering crowd of hundreds of thousands Tuesday with his first appearance in their midst after being released from 12 days in secret detention. "We won't give up," he promised at one of the biggest protests yet in Cairo's Tahrir Square. Once a behind-the-scenes Internet activist, 30-year-old Wael Ghonim has emerged as an inspiring voice for a movement that has taken pride in being a leaderless "people's revolution." Now, the various activists behind it - including Ghonim - are working to coalesce into representatives to push their demands for President Hosni Mubarak's ouster. With protests invigorated, Vice President Omar Suleiman issued a sharply worded warning, saying of the protests in Tahrir, "We can't bear this for a long time, and there must be an end to this crisis as soon as possible," in a sign of growing impatience with 16 days of mass demonstrations. For the first time, protesters made a foray to Parliament, several blocks away from their camp in the square. Several hundred marched to the legislature and chanted for it to be dissolved.