Geothermal: Getting Energy from the Earth

August 31, 2010
 | by earthpolicy
No Comments

Plan B 4.0: Mobilizing to Save Civilization by Lester R. BrownLester R. Brown

The heat in the upper six miles of the earth’s crust contains 50,000 times as much energy as found in all the world’s oil and gas reserves combined. Despite this abundance, only 10,700 megawatts of geothermal electricity generating capacity have been harnessed worldwide.

Partly because of the dominance of the oil, gas, and coal industries, which have been providing cheap fuel by omitting the costs of climate change and air pollution from fuel prices, relatively little has been invested in developing the earth’s geothermal heat resources. Over the last decade, geothermal energy has been growing at scarcely 3 percent a year.

Roughly half the world’s existing generating capacity is in the United States and the Philippines. Indonesia, Mexico, Italy, and Japan account for most of the remainder. Altogether some 24 countries now convert geothermal energy into electricity. El Salvador, Iceland, and the Philippines respectively get 26, 25, and 18 percent of their electricity from geothermal power plants.

The potential of …

A Global Shift to Renewable Energy

August 24, 2010
 | by earthpolicy
No Comments

Plan B 4.0: Mobilizing to Save Civilization
Lester R. Brown

As fossil fuel prices rise, as oil insecurity deepens, and as concerns about climate change cast a shadow over the future of coal, a new energy economy is emerging. The old energy economy, fueled by oil, coal, and natural gas, is being replaced by one powered by wind, solar, and geothermal energy. Despite the global economic crisis, this energy transition is moving at a pace and on a scale that we could not have imagined even two years ago. And it is a worldwide phenomenon.

Consider Texas. Long the leading U.S. oil-producing state, it is now also the leading generator of electricity from wind, having overtaken California in 2006. Texas now has 9,700 megawatts of wind generating capacity online, 370 more in the construction stage, and a huge amount in the development stage. When all of these wind farms are completed, Texas will have 53,000 megawatts of wind generating capacity—the equivalent of 53 coal-fired power plants. This will …

Rising Temperatures Raise Food Prices: Heat, Drought, and a Failed Harvest in Russia

August 10, 2010
 | by earthpolicy
No Comments

Around midnight on Wednesday, August 11th, a group of commodity analysts will gather at a meeting site in the massive South Building of the U.S. Department of Agriculture (USDA) in Washington, D.C. Once they are assembled, the door will be locked. Cell phones will be collected. Phone and Internet lines will be disconnected. Short of a medical emergency, no one will be permitted to leave before 8:30 am.

USDA produces an estimate of world grain production, consumption, and trade by the 12th of each month. The gathered analysts will consult reports from a worldwide network of agricultural attachés, satellite images of crop vegetation, and the latest weather reports. The widely respected World Agricultural Outlook Board’s report, though little known to the public, is of incalculable value to commodity traders, agribusinesses, and farmers—some of whom stand to gain or lose fortunes on the data it contains.

At 7:00 am on Thursday, shortly after the assembled team has completed its latest monthly estimate of this year’s world grain harvest, a handful of accredited agricultural reporters will be admitted and given access to the data …

Raising Appliance Efficiency: A Win for Consumers and the Climate

July 29, 2010
 | by earthpolicy
No Comments

Lester R. Brown

There are enormous opportunities to use energy more efficiently. Investing in energy efficiency is often far cheaper than expanding the energy supply to meet growing demand. Efficiency investments typically yield a high rate of return, saving consumers money, and can help fight climate change by avoiding carbon dioxide (CO2) emissions from burning additional fossil fuels. Just as compact fluorescent lamps (CFLs) offer great electricity savings over incandescent light bulbs, a similar range of efficiencies is available for many household appliances, such as refrigerators and home electronics.

The U.S. Energy Policy Act of 2005 was designed to exploit some of these potential savings. It raises appliance efficiency standards high enough to close 29 power plants that burn coal, the most carbon intensive of the fossil fuels. Other provisions in the act—such as tax incentives that encourage the adoption of energy-efficient technologies, a shift to more combined heat and power generation, and the adoption of real-time pricing of electricity (a measure to discourage optional electricity use during peak demand periods)—would …

Global Carbon Dioxide Emissions Fall in 2009 – Past Decade Still Sees Rapid Emissions Growth

July 20, 2010
 | by earthpolicy
No Comments

Amy Heinzerling

In 2009, carbon dioxide (CO2) emissions in China—the world’s leading emitter—grew by nearly 9 percent. At the same time, emissions in most industrial countries dropped, bringing global CO2 emissions from fossil fuel use down from a high of 8.5 billion tons of carbon in 2008 to 8.4 billion tons in 2009. Yet this drop follows a decade of rapid growth: over the 10 previous years, global CO2 emissions rose by an average of 2.5 percent a year—nearly four times as fast as in the 1990s. Increasing temperatures and the resulting melting ice sheets and rising sea levels demonstrate the destructive effects of the carbon accumulating in the atmosphere.

Emissions in many wealthier countries fell in 2008 and 2009 as the global recession took hold. In the United States, CO2 emissions shrank by nearly 10 percent from 2007 to 2009, from a high of 1.58 billion tons of carbon to 1.43 billion tons, the lowest

…

The Emerging Politics of Food Scarcity

July 14, 2010
 | by earthpolicy
No Comments


Lester R. Brown

A dangerous geopolitics of food scarcity is emerging in which individual countries, acting in their narrowly defined self-interest, reinforce the trends causing global food security to deteriorate. This began in late 2007 when wheat-exporting countries, like Russia and Argentina, attempted to counter domestic food price rises by limiting or banning exports. Viet Nam banned rice exports for several months, and several other minor exporters also restricted exports. While these moves reassured those living in the exporting countries, they created panic in the scores of countries that import grain.

At that point, as world market prices for grain and soybeans were tripling, governments in food-importing countries suddenly realized that they could no longer rely on the market for supplies. In response, some countries tried to nail down long-term bilateral trade agreements that would lock up future grain supplies. The Philippines, a leading rice importer, negotiated a three-year deal with Viet Nam for a guaranteed 1.5 million tons of rice each year. A delegation from Yemen, which now imports most of its …

The Return of the Bicycle

July 6, 2010
 | by earthpolicy
1 Comment

Plan B 4.0: Mobilizing to Save Civilization
Lester R. Brown

The bicycle has many attractions as a form of personal transportation. It alleviates congestion, lowers air pollution, reduces obesity, increases physical fitness, does not emit climate-disrupting carbon dioxide, and is priced within the reach of the billions of people who cannot afford a car. Bicycles increase mobility while reducing congestion and the area of land paved over. Six bicycles can typically fit into the road space used by one car. For parking, the advantage is even greater, with 20 bicycles occupying the space required to park a car.

Few methods of reducing carbon emissions are as effective as substituting a bicycle for a car on short trips. A bicycle is a marvel of engineering efficiency, one where an investment in 22 pounds of metal and rubber boosts the efficiency of individual mobility by a factor of three. On my bike I estimate that I get easily 7 miles per potato. An automobile, which requires at least a ton of material to transport one …

The Population-Poverty Connection

June 29, 2010
 | by earthpolicy
No Comments

Plan b 4.0: Mobilizing to Save Civilization
Lester R. Brown

The 21st century began on an inspiring note: the United Nations set a goal of reducing the share of the world’s population living in extreme poverty by half by 2015. By early 2007 the world looked to be on track to meet this goal, but as the economic crisis unfolds and the outlook darkens, the world will have to intensify its poverty reduction effort.

Among countries, China is the big success story in reducing poverty. The number of Chinese living in extreme poverty dropped from 685 million in 1990 to 213 million in 2007. With little growth in its population, the share of people living in poverty in China dropped from 60 percent to 16 percent, an amazing achievement by any standard.

India’s progress is mixed. Between 1990 and 2007, the number of Indians living in poverty actually increased slightly from 466 million to 489 million while the share living in poverty dropped from 51 percent to 42 percent. Despite its economic growth, averaging 9 …

Raising Water Productivity to Increase Food Security

June 22, 2010
 | by earthpolicy
No Comments

Plan B 4.0: Mobilizing to Save Civilization
By Lester R. Brown

With water shortages constraining food production growth, the world needs an effort to raise water productivity similar to the one that nearly tripled land productivity over the last half-century. Since it takes 1,000 tons of water to produce 1 ton of grain, it is not surprising that 70 percent of world water use is devoted to irrigation. Thus, raising irrigation efficiency is central to raising water productivity overall.

Data on the efficiency of surface of water projects—that is, dams that deliver water to farmers through a network of canals—show that crop usage of irrigation water never reaches 100 percent simply because some irrigation water evaporates, some percolates downward, and some runs off. Water policy analysts Sandra Postel and Amy Vickers found that “surface water irrigation efficiency ranges between 25 and 40 percent in India, Mexico, Pakistan, the Philippines, and Thailand; between 40 and 45 percent in Malaysia and Morocco; and between 50 and 60 percent in Israel, Japan, and Taiwan.”

Irrigation water efficiency …

How Many Energy-Efficient Light Bulbs Does It Take to Close 705 Coal Plants?

June 16, 2010
 | by earthpolicy
No Comments

Plan B 4.0: Mobilizing to Save Civilization
Lester R. Brown

The lighting sector is on the edge of a spectacular revolution, a shift from the century-old, inefficient incandescent light bulb to far more efficient technologies. Perhaps the quickest, most profitable way to reduce electricity use worldwide—thus cutting carbon emissions—is simply to change light bulbs.

The first advance in this field came with compact fluorescent lamps (CFLs). Replacing old-fashioned inefficient incandescent bulbs that are still widely used today with new CFLs can reduce the electricity used for lighting by three fourths. Over its lifetime, each standard (13 watt) CFL will reduce electricity bills by roughly $30. And though a CFL may cost twice as much as an incandescent, it lasts 10 times as long. Each one reduces energy use compared with an incandescent by the equivalent of 200 pounds of coal over its lifetime. For perspective, the energy saved by replacing a 100-watt incandescent bulb with an equivalent CFL over its lifetime is sufficient to drive a Toyota Prius hybrid car from New York …

Page 1 of 41234»