Archive for November, 2008

Ocean Currents Can Power the World

Saturday, November 29th, 2008
Vivace

“A revolutionary device that can harness energy from slow-moving rivers and ocean currents could provide enough power for the entire world, scientists claim.

The system, conceived by scientists at the University of Michigan, is called Vivace, or “vortex-induced vibrations for aquatic clean energy”.

Michael Bernitsas, a professor of naval architecture at the university, said it was based on the changes in water speed that are caused when a current flows past an obstruction. Eddies or vortices, formed in the water flow, can move objects up and down or left and right.

The new device, which has been inspired by the way fish swim, consists of a system of cylinders positioned horizontal to the water flow and attached to springs.

As water flows past, the cylinder creates vortices, which push and pull the cylinder up and down. The mechanical energy in the vibrations is then converted into electricity.”

Vivace: Telegraph.co.uk

Fish Stock Plummeting

Wednesday, November 26th, 2008

We’ll all be vegans with no choice about it….

…walleye pollack, which accounts for a third of the total US fish catch, is … in danger.

Fisheries scientists met last week in Seattle and recommended that next year’s catch in the eastern Bering Sea, the main walleye pollack-fishing region for US boats, be cut by 18% to 815,000 tonnes. See the report (pdf format).

A series of cuts in recent years have seen the quota drop from almost 1,500,000 tonnes in 2005.
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In addition there is tuna:

The collapse of north Atlantic cod populations could provide an important lesson for preventing tuna from suffering a similar fate worldwide, researchers say.

Over-fishing caused Canada’s cod industry to plummet in value from $1.4 billion in 1968 to just $10 million in 2004. Now researchers warn that tuna fisheries worldwide are on the brink of a similar collapse.

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And see Andrew Revkin’s The (Tuna) Tragedy of the Commons

Electrical Vehicle Take Off?

Wednesday, November 26th, 2008

Nissan is serious about being the leader in electric vehicles by taking a three-step approach: (1) developing a charging infrastructure, (2) seeding the market with EVs in 2010, and (3) leading in EV manufacturing volume in 2012. The initial vehicles show-off a new body design, be freeway speed, and have a 100-mile range.

With Nissan USA located in Tennessee, it is seeing strong support there for a statewide charging infrastructure. Tennessee Governor Phil Bredesen stated, “Our clean-energy future depends on our ability to find real strategies for encouraging Tennesseans to adopt a zero-emission mindset.” The state is focused on heavily trafficked Interstate 24 and Interstate 65 corridors.

“As the nation’s largest public power supplier, TVA is looking forward to being part of this project to explore the potential of electric vehicles,” said TVA Chairman William Sansom in joining the Tennessee initiative. “Electric vehicles could put electricity to work overnight, or off-peak, when other power needs are lower.”

Nissan and EV

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Then there is this from China:

SAIC Accelerates in Chinese Electric-Car Market
The Shanghai-based car maker sets up a $293 million joint venture to develop hybrid and all-electric cars.

Slump May Limit Moves on Clean Energy

Tuesday, November 25th, 2008

Elisabeth Rosenthal writes in the NY Times about the worst of all possible outcomes of the economic melt down.

From Italy to China, the threat to jobs, profits and government tax revenues posed by the financial crisis has cast doubt on commitments to cap emissions or phase out polluting factories.

Automakers, especially Detroit’s Big Three, face collapsing sales, threatening their plans to invest heavily in more fuel-efficient cars. And with gas prices now around $2 a gallon in the United States, struggling consumers may be less inclined than they once were to trade in their gas-guzzling models in any case.

Reading the comments in the article from national leaders tells us they do not get it yet. The crisis offers unparalleled opportunity to start afresh, to throw every nickle into climate stabilizing technologies. If Detroit in 1942 could completely remake itself from car production to tank and plane production it is possible to imagine such a remake towards wind turbines, electrical infrastructure, solar panels on every mall in America. Not another gas firing automobile should be made. Communities, especially in the sun-belt should no longer use fossil fuel for light, household electrical or cooking within four years.

Andrew Revkin, also in the Times, refers to Rosenthal’s article and to Joseph Romm’s challenge we posted yesterday to ask readers — how do we move out of TRANCE mode in the face of climate change?

Rain Saturates Southern Brazil

Tuesday, November 25th, 2008

Landslides and floods caused by heavy rain have killed at least 59 people and forced more than 43,000 from their homes in southern Brazil.

Brazil

E-Waste Dumping around the World

Monday, November 10th, 2008

An absolutely scandalous report from 60 Minutes about illegal e-waste dumping in China. We have posted stuff about technological dumping before but nothing quite this immediate and damning.

The Silicon Valley Toxics Coalition is one place to turn to for more information, and action.

The NRDC, which has a spokesperson in the 60 Minutes piece, also has further information.

Unprecedented Warming

Friday, November 7th, 2008

While the planet has experienced numerous changes in climate over the past 65 million years, the most significant climate change of the last 5,000 years has been in recent decades. That change is global warming.

A Cornell study reports that as a result of this warming, which has caused Arctic freshwater ice to melt and flow southward, the ranges of some cold-water, northern marine species have been moving down the North American coast — a counterintuitive finding.”

Unprecedented Warming