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Renewable energy (Alternative Energy)
https://www.youtube.com/watch?v=h3igFYFDN-Y... Read more
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The Environment and Human Health
https://www.youtube.com/watch?v=fNurLhVqcNs... Read more
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Solutions to prevent environmental pollution
https://www.youtube.com/watch?v=mDJivngYBQE... Read more
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15 Major Current Environmental Problems
http://www.mediafire.com/download/yd5cp0cvap8... Read more