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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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| Glass stairs have become increasingly common during the last few years. This is partly due to architectural fashion, but, mainly, it is a result of considerable improvements that have been made in reference to the strength of glass used for structural purposes.