This week we were introduced to how the different setting work in CAD. We learned how the setting could help us create more accurate drawings.
The U.S gets most of its coal from Wyoming, Virgina, Kentucky, Pennsylvania. The coal gets shipped over here by train.California doesn't burn its own coal, instead it gets burned in Nevada. Coal mining has changed over the years. We use to use pickaxes but we now use mountain top removal. Coal is slowly starting to go away the more and more we use it. An estimate on how long coal will last is about another 300 years. That is for when it will run out but it could run low much sooner than that. Coal is a great use for fuel but it is also very dangerous. It releases dangerous gas that harms humans. It also releases large amounts of pollution.
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