Loads of information on saving energy and info about renewable energy. Tips for consumers in homes, what's going on in your state, even EERE for Kids.  
 
I was going to post this link on tankless water heaters, but it turns out the whole site would be a lot more useful.  
 
Also see How to Save Electricity (on LF) if you're interested in putting these tips to use. More from EERE on LF.
PV Systems and Net Metering
Posted by Hornpipe2 in the biz 11 years ago
Net metering is a policy that allows homeowners to receive the full value of the electricity that their solar energy system produces. The term net metering refers to the method of accounting for a photovoltaic (PV) system's electricity production, for example. Homeowners with PV systems can thus offset their electric bill with any excess electricity they produce. As the homeowner's PV system produces electricity, the kilowatts are used first to meet any electric requirements (e.g., appliances, lights) in the home. If more electricity is produced from the PV system than the home needs, the extra kilowatts are fed into the utility grid.  
 
Under federal law, utilities must allow independent power producers to be interconnected with the utility grid, and utilities must purchase any excess electricity they generate. Many states have gone beyond the minimum requirements of the federal law by allowing net metering for customers with PV systems. With net metering, the customer's electric meter will run backward when the solar electric system produces more power than is needed to operate the home or business at that time. An approved, utility-grade inverter converts the dc power from the PV modules into ac power that exactly matches the voltage and frequency of the electricity flowing in the utility line; the system must also meet the utility's safety and power-quality requirements. The excess electricity is then fed into the utility grid and sold to the utility at the retail rate.  
 
Neat. You can sell power back to the power companies.
To order a hardcopy of the 2005 or 2006 Fuel Economy Guide, fill out the form using the instructions [at the link]. The 2006 FEG has arrived and all back-orders are being processed and shipped.  
 
Please note that we can only ship to U.S. addresses.
Grow Your Own Oil, U.S.
Posted by Mac in blinded by science 12 years ago
Researchers hoping to ease America's oil addiction are turning sawdust and wood chips into bio-oil, a thick black liquid that could become a green substitute for many petroleum products.  
 
Bio-oil can be made from almost any organic material, including agricultural and forest waste like corn stalks and scraps of bark. Converting the raw biomass into bio-oil yields a product that is easy to transport and can be processed into higher-value fuels and chemicals.  
 
The United States can grow enough fresh biomass -- more than a billion tons each year -- to supplant at least a third of its annual petroleum use, according to an April 2005 study (.pdf) by the U.S. departments of Agriculture and Energy.
The Alternative Fuels Data Center is a vast collection of information on alternative fuels and the vehicles that use them. Alternative fuels described here are those defined by the Energy Policy Act of 1992, including biodiesel, electricity, ethanol, hydrogen, natural gas, and propane. This site has more than 3,000 documents in its database, an interactive fuel station mapping system, current listings of available alternative fuel vehicles, and lots of alternative fuels information and related links.