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| The article written by Mr. László Vákár and presented at the GPD 2009.Air pollution is high on the political agenda worldwide. Emissions have to be reduced.
| The progress obtained so far, and the future trends for the two most successful thin film solar cells, namely CulnGaSe2/CdS and CdTe/CdS, are described in this article.
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| The use of transparent glass in conducting electricity using LEDs, short for light emitting diodes, is increasing. LED's are approaching the lifespan of standard building materials, making it cost effective to embed them directly in structural components and architectural finishes.