1
Published in 2013
This YouTube clip from MinuteEarth describes how soil liquefaction works, and why it causes buildings and cars to collapse and sink into the ground.
Grade Level   6 7 8 9 10 11 12
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2
Published in 2015
Loads of salt aren’t just bad for humans, but plants as wall. Plants absorb the salt through their roots, potentially cutting off their water supply, causing for dead plants. Watch this video to learn what farmers are doing to reduce the high levels of salt in the soil.
Grade Level   3 4 5 6 7 8 9 10 11 12
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