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“One metric ton of ore/rock/sand/soil has 11/30 metric tons of CO2, 1/9 kilograms of Dy, 880/3...Ore, rock, sand, soil
“Coal is a combustible black or dark brown rock consisting mainly of carbonized plant matter...Coal
“Recycling one gallon of motor oil can save 1,000,000 gallons of water pollution, 4 acres of land...Oil recycling
“Recycling one kWh of energy can save 1/7 pounds of Al, 50 kilograms of limestone, 4/5 pounds of...Energy recycling
This category has the following 3 subcategories, out of 3 total.
Pages in category "Limestone conservation"
The following 49 pages are in this category, out of 49 total.