https://padlet.com/brennang1888/3fjdc8y4irje Made with an open mind en-us 2019-04-09 21:15:33 UTC 2024-12-05 13:17:32 UTC hello@padlet.com brennang1888 https://padlet.com/brennang1888/3fjdc8y4irje/wish/350144647 Coal can be extracted from the earth either by surface mining or underground mining. Once coal has been extracted, it can be used directly to fuel power plants for electricity. If coal is less than 61 meters 200 feet underground, it can be extracted through surface mining.]]> 2019-04-09 21:33:47 UTC https://padlet.com/brennang1888/3fjdc8y4irje/wish/350144647 justinw0269 https://padlet.com/brennang1888/3fjdc8y4irje/wish/350144758 The energy in coal comes from energy that was stored in giant plants that lived hundreds of millions of years ago in swamp forests. When these giant plants and ferns died, they formed layers at the bottom of the swamps. Water and dirt began to pile up on top of the dead plant remains.]]> 2019-04-09 21:34:18 UTC https://padlet.com/brennang1888/3fjdc8y4irje/wish/350144758