For years now, people have been dumping concrete blocks and all sorts of man-made structures into the ocean. Their goal? Creating new reefs and encouraging marine life.
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00:00In a standard concrete of this type, there is 35% sand, 45% gravel, 10-12% sand, 10-15%
00:27concrete, and 10% water.
01:57For every tonne of cement, it produces about one tonne of CO2.
02:57Using waste materials, not new materials, reduces that by about 80%.
03:27Thank you for watching!