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Cleantech innovation: We are as gods, so we might as well get good at it.

How to avoid shadows on solar collectors and protect your solar investments; how to explore the solar energy potential of your site and optimize your solar project according to your local architecture conditions and regional climate characteristics.

Official site of The Week Magazine, offering commentary and analysis of the day

YouTube is a place to discover, watch, upload and share videos.

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Our goal at TeacherTube.com is to provide an online community for sharing instructional teacher videos. Upload your lesson plan videos or watch student video lessons at our website.

Vimeo is a respectful community of creative people who are passionate about sharing the videos they make. We provide the best tools and highest quality video in the universe.

The ultimate royalty-free image, video and illustration bank for professionals. One license and everything else is free.

Learn how to do just about everything at eHow. Expert Village is now a part of eHow, adding expert How To videos to eHow, the world

View hundreds of free videos from National Geographic, featuring animal videos, weather videos, nature videos, world music videos and other most popular video content including shark videos.