Idk maybe they value it as a resource that is running out or they could value it as a resource htat they need to get rid off. But at this rate of consumption coal will only last for another 100 or 200 years.
Anthracite coal
Anthracite has the highest calorific value. and South African coal is best in the world.
Gross calorific value of coal
Coal
Starting at 3.5 cents a pond for cheap crappy coal
Theorotical value can be calculated using the results of ultimate analysis of coal . Based on the GCV of combustible value of coal.
coal dose have a impact because we use coal for machines and by digging up coal people have jobs
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Useful heat value(UHV) pricing mechanism of coal deducted ash and moisture content from standard formula and in this coal is categorised into 7 grades. Gross calorific value(GCV) of coal has 17 grades and prices are linked to the actual calorific value/quality of coal-by latika joshi
It varies based on the type and grade of coal. The heat value is less for bituminous than for anthracite, etc.
Esthetics and Coal.
coal was discovered by two people digging and then they found coal so then they invented coal and discovered it