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How to green the world's deserts and reverse climate change | Allan Savory - YouTube
https://www.youtube.com/watch?v=vpTHi7O66pI
"Desertification is a fancy word for land that is turning to desert," begins Allan Savory in this quietly powerful talk. And terrifyingly, it's happening to ...
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Bristol Hercules sleeve valve radial animation - YouTube
https://www.youtube.com/watch?v=_vrvep_YOio
an animation based on the Bristol engine designed prior to WW2. The four cycle engine used moving sleeves between the piston and cylinder instead of valves. ...
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LatmaTV - YouTube
https://www.youtube.com/user/LatmaTV
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