LNG: Benefits and Risks of Liquified Natural Gas

For decades, natural gas has been used to provide clean power to thousands of households and businesses nationwide. Today, more than 1,000 vehicles traveling U.S. roads are powered by natural gas that is cooled to a liquid—liquefied natural gas (LNG). LNG results when natural gas is cooled to temperatures of 260 degrees below zero, thus […]

Geothermal Resource Descriptions

Part 4 of Geothermal Energy Under Our Feet. Hydrothermal A hydrothermal system is defined as a subterranean geothermal reservoir that transfers heat energy upward by vertical circulation of fluids driven by differences in fluid density that correspond to differences in temperature (see Figure 2). Hydrothermal systems can be classified into two types—vapor-dominated and hot water— […]

Carbon Monoxide: Invisible Danger

What is carbon monoxide? Carbon monoxide (CO) is a poisonous, colorless, odorless, and tasteless gas. Although it has no detectable odor, CO is often mixed with other gases that do have an odor. So, you can inhale carbon monoxide right along with gases that you can smell and not even know that CO is present. […]

2010 Clean Energy Vehicle Buyer’s Guide

Introduction Those who depend on foreign oil for transportation fuel have seen prices roller-coaster between $5/gallon and $1.75/gallon and back up again. The economic impact of our dependence on foreign oil could not be clearer. To get off the roller-coaster, smart consumers are looking at the expanding availability of advanced, efficient vehicles, including hybrids and […]

What is energy?: Learning About Saving Energy

Part 1 of Learn About Saving Energy. Energy is the ability to do work. It can come in the forms of heat and light. There are two types of energy: working energy and stored energy. Stored energy becomes working energy when we use it. You eat food for energy. Then your body stores the energy […]

Storage Water Heaters

Part 2 of Selecting a New Water Heater. Storage water heaters remain the most frequently used type of water heater for residential purposes. A variety of fuel options are available for conventional storage water heaters—electricity, natural gas, oil, and propane. Ranging in size from 20 to 80 gallons (75.7 to 302.8 liters), storage water heaters […]