The graph shows the millions of dollars invested in clean energy.

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One of the largest inhibitors to cheap solar power has always been the high cost of solar panels, due to their thick glass, framing, and expensive silicon.

San Jose-based Nanosolar, Inc. appears ready to eliminate these barriers with solar technology that utilizes thin sheets of non-silicon components that reduce the production costs by over 90% and decreases the thickness by 99%.  The Nanosolar PowerSheets are thin enough to be rolled up.

Unlike many other solar companies, Nanosolar has already built a massive manufacturing plant and intends to deliver its first solar sheets to European customers in 2008 at a price that will put solar power at or below the per watt price of fossil fuel-based energy.

The company claims that the technology is so versatile that they could be incorporated into roofing shingles or even rolled onto the top of cars or trucks. 

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On average 8x as much air is exhanged when a swing door is opened as opposed to a revolving door. That's 8x as much new air that needs to be heated or cooled and that's why using the revolving door is a great way to reduce energy requirements.

The air that is inside a building has been “conditioned” to make it comfortable for the occupants. We call the equipment that does this “air conditioners” in the summer, but the air heating equipment in use during the winter and ventilation “make-up air” consumed year round is also conditioned air. Energy is required to condition air -- to make hot, moist air cold and dry in the summer and to make cold, dry air warm in the winter. Thus, whenever air is exchanged between inside and outside, air conditioning equipment has to work harder, using more energy.

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