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Via: 350.org

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Energy Efficiency aims at reducing energy consumption without downgrading the quality of service delivered, thus reducing economic, ecological and social costs.

Hot-Water Heating the 2nd Biggest Energy User in the Home

Water heating is usually the second biggest energy user in the home, just after space heating. A typical American uses 60 gallons of water a day, which includes 17 gallons are hot water. Residential water heaters consume about 21 percent of the average home's total energy use. There are many simple and easy ways to reduce hot water use.

Lower your water-heater thermostat to 120ºF. Every 10 degrees saves three percent to five percent in hot-water energy costs.
If you have a water heater separate from your furnace wrap the hot water tank with an insulation jacket (made especially for water heaters) to reduce the heat loss.
Insulate the hot water pipes with foam tubing to further reduce heat loss
If your hot water heater is separate from your home heating system, when you are away for a period of time you can shut the hot water heater off, just make sure you aren’t shutting down your home heating system too, especially this time of year.
Wash clothes in cold water (about 80 percent of the energy used by a washing machine goes to heat the hot water).
Only run the dishwasher when it is full, but surprisingly most dishwashers uses less hot water than if you hand wash the dishes!
Use low-flow shower heads (no more than 1.5 gallons per minute flow rate) and limiting the length of showers.
After reducing your hot water use, consider a solar hot-water system. Solar hot water systems have a relatively short payback period (on the order of 4-6 years) and can provide about 70 percent of annual hot water needs.

Hot-Water Heating the 2nd Biggest Energy User in the Home

Water heating is usually the second biggest energy user in the home, just after space heating. A typical American uses 60 gallons of water a day, which includes 17 gallons are hot water. Residential water heaters consume about 21 percent of the average home's total energy use. There are many simple and easy ways to reduce hot water use.

Lower your water-heater thermostat to 120ºF. Every 10 degrees saves three percent to five percent in hot-water energy costs.
If you have a water heater separate from your furnace wrap the hot water tank with an insulation jacket (made especially for water heaters) to reduce the heat loss.
Insulate the hot water pipes with foam tubing to further reduce heat loss
If your hot water heater is separate from your home heating system, when you are away for a period of time you can shut the hot water heater off, just make sure you aren’t shutting down your home heating system too, especially this time of year.
Wash clothes in cold water (about 80 percent of the energy used by a washing machine goes to heat the hot water).
Only run the dishwasher when it is full, but surprisingly most dishwashers uses less hot water than if you hand wash the dishes!
Use low-flow shower heads (no more than 1.5 gallons per minute flow rate) and limiting the length of showers.
After reducing your hot water use, consider a solar hot-water system. Solar hot water systems have a relatively short payback period (on the order of 4-6 years) and can provide about 70 percent of annual hot water needs.

Replacing Nuclear with Concentrated Solar Thermal Power..

Students from the Palestine Polytechnic University
TMT, the vehicle can hit a maximum speed of 30kph. Powered by 12 batteries, totaling 24V, the car can run for 100 minutes, after which the batteries can also be recharged at home.