It seems solar thermal power has quietly grown up, while photovoltaic power has gotten all the attention.  It isn’t as though there isn’t a lot to like about photovoltaics - they require almost no maintenance, they last for several decades, they emit zero pollution, and if the claims of companies like Nanosolar are to be believed, they are about [...]

The Tesla Roadster is the first all-electric car to rely on lithium ion batteries.  But these batteries, which have the highest energy density of any battery available, are also prone to overheating.  How has Tesla addressed this potential problem?
According to the Tesla website’s “how it works” page, “The system addresses thermal balancing with a liquid [...]

Our last post on global warming, where we referenced a Wall Street Journal article by MIT Professor of Meteorology, Richard S. Lindzen, received more than a few comments.
There is an excellent resource online that identifies many of the high-profile individuals around the world who are on record as challenging global warming theories - it’s called SourceWatch and [...]

There aren’t too many things more important to human survival and environmental health than watersheds. As much as any other criteria, the boundries of watersheds delineate the eco-regions where we are either meeting or failing to meet the challenge of preserving and cleaning up our ecosystems. Do you want to monitor and manage global climate [...]

Already the world capital for high technology, the Silicon Valley appears poised to distinguish itself as the undisputed leader in green technology as well. Not only is the most interesting new battery powered car getting built by a Silicon Valley company, Tesla Motors, but now a four year old company “Nanosolar,” based in Palo Alto, [...]

How large would your photovoltaic array have to be, if you wanted to power your electric vehicle with sunlight?
The first step is to calculate the mileage of your electric car. With a gasoline car, mileage is measured in miles per gallon. With an electric car, mileage is measured in miles per kilowatt-hour. If you read [...]

A car running on electricity drawn from the power grid and stored on-board can be fueled at about one-third the cost per mile compared to a gasoline-powered car. We prove this in our recent post Electric Car Cost Per Mile.
There are at least three technologies to store electricity on-board an electric vehicle; hydrogen which is [...]