Recycling one ton of paper can save 17 trees, 7,000 gallons of water, 380 gallons of oil, 3.3 cubic yards of landfill space and 4,000 kilowatts of energy-enough to power the average U.S. home for six months- and reduce greenhouse gas emissions by one metric ton of carbon equivalent (MTCE).
Slate is a fine-grained, foliated metamorphic rock that is created by the alteration of shale or mudstone by low-grade regional metamorphism. It is popular for a wide variety of uses such as roofing, flooring and flagging because of its durability and attractive appearance.
The chalk used in classrooms around the world is a type of sedimentary rock. Limestone is a sedimen â¦ tary rock that is used in concrete, building stones, antacids, soil conditioner, and steel making. Coal is another sedimentary rock which is used to produce heat and electricity. Shale is used to make brick. Sandstone and limestone are used as building stone and in the production of glass. 2  Limestone is also used for hard core in roads, and is cooked to make cement. 3  Shale is mixed with sand and used to make bricks.