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Daniel Barrie and Daniel Kirk Davidoff, from the University of Maryland, conducted an experiment aimed to demostrate what huge wind turbine fields could do to the environment, extra to producing electricity. They took the pattern of expanding turbine fields to an extreme, and used a computer model to calculate what might happen if all the land from Texas to central Canada, and from the Great Lakes to the Rocky Mountains were covered in one massive wind farm. What did they get with this simulation? They got a decrease of the wind speed with 2-3 meters per second (5.5 - 6.7 mph), plus a disruption of the air currents over all the north hemisphere. And that could be a source for storms, hurricanes, and other meteorological phenomena.

The Ampera is an electric vehicle that can operate in a wide range of weather climates. It is powered by electricity at all times and speeds. For the first 40 - 80 km, power is supplied by the electricity stored in the 16-kWh, lithium-ion battery. While driving on electricity delivered by the battery, the Ampera drives free of gas- and tailpipe-emissions.

The terms "global warming" and "climate change" are often used interchangeably. I've pretty much used "global warming" over the years, but now I'm making the switch to "climate change:" It's the term used by the United Nations, academia, and it's more inclusive, since "change" can refer to increased rain, drought, or any type of weather event other than just warming. So is there really a difference in definitions?

The report presents how climate will change according to climate models concerning the planning and building of electric power networks from the present state to the period from 2016 to 2045. The essential impacts of changes in weather conditions on planning and building of electric network are defined regionally based on the climate change scenarios. The importance of the effects is shown as costs and failure durations for different line structures. Moreover, the influence of the climate change on the loading capacity of the power system components is presented. On the basis of all these factors it will be judged how strong an effect the climate change has in the present electric power network and how one should be prepared for it.

This week, a coalition of scientific societies and university organizations is slated to hand the Obama and McCain campaigns detailed steps and budget estimates for improving America's ability to monitor and forecast climate trends and severe weather. This October, the Presidential Climate Action Project (PCAP), based at the University of Colorado at Denver, is expected to offer up an exhaustive agenda for a president's first 100 and 1,000 days.

Organisations face a number of questions when they are considering their energy efficiency such as why is your company's electricity bill high? Have you established your company's energy priorities, and have you considered how the weather conditi...

"This web page produces a numerical table of sunrise, sunset, daily insolation at top of atmosphere, and sunlight-weighted cosine of the zenith angle at a single specified location. The produced table contains data for a single month, or if a month is not provided, data for a single calendar year. Latitude and longitude must be given in degrees and hundredths of degrees, not degrees and minutes. Default location is the Central Park weather station, New York City. "

To get a sense of what seven years of drought in the Colorado River basin looks like, all you have to do is gaze out at Lake Mead from the top of the dam here and view the 108 feet of brightly colored earth below the familiar red walls rising from the water.

Capturing energy from the earth's heat is pretty easy pickin's for geologically-active areas of the world like Iceland, Indonesia, and Chile. In some locations, hot fluids are so near the earth's surface that heat from naturally-occurring hot fluids can be directly circulated through buildings for heating. Iceland, in particular, takes advantage of this low-hanging energy fruit. However, in most areas of the world where geothermal energy is captured, the heat is used to generate electricity. Conventional Geothermal Energy Unlike some of the more common alternative energies - hydro, solar, and wind - geothermal is impervious to weather conditions. This independence means it provides excellent base load electricity. Currently all commercial geothermal electricity is generated by so-called conventional systems, whereby naturally- occurring hot water or steam is accessed at comparatively shallow depths in areas of very high geothermal gradient. Wells are commonly drilled to depths on the order of 2 km. The water or steam they produce is used to spin turbines that in turn generate electricity.

For at least a decade, carmakers have been professing their deep and abiding interest in electric-drive vehicles whenever possible. But until recently, it wasn't always clear which of them were really sincere. Today every last one of them seems sincere. As this year's "Top 10 Tech Cars" package shows, ever more varied hybrids are going into mass production, along with-you betcha-a few all-electric cars. Some of the electric-drive machines aspire beyond mere greenness to heart-pounding performance, an aspiration that may seem strange to those taught to view electric cars as spacious, all-weather golf carts. But performance is indeed a logical goal, given the instant-on torque that electric motors provide. While electrons may now be a recurrent theme of our annual Top 10 automotive reports, we do not slight the internal-combustion engine, which has lots of life-and technological enhancements-to come. And for those who don't spend a whole lot of time worrying about whether they're treading lightly enough on the planet's roads, we include two ultraperformance German sports cars that run purely on gasoline and adrenaline. One can easily be yours. If you're willing to trade in your house for it.

Small wind turbined for urban areas. silent, easy to install, 18 years payback...