Schematic diagram of an underground coal mine, showing surface facilities, access shaft, and the roomandpillar and longwall. Tavantolgoi coal mine, southern Gobi, Mongolia. Children hauling coal up the slope of an English mine; from an engraving of the 1840s.
PPT theme consisting of factory pollution clouds hazard save the planet red background burning coal creates template size Audience pleasing PPT layouts consisting of coal mine background backdrop and a dark gray colored foreground . ... 'coal' powerpoint templates ppt slides images graphics and themes.
Coal is a chemically complex substance, naturally containing many trace elements including mercury, selenium and arsenic. The combustion of coal can result in trace elements being released from power stations with potentially harmful impacts to both human health and the environment.
SA has abundant coal reserves. Coalfired power stations are reliable. South Africa's infrastructure to generate electricity from coal is well established. Burning coal is the most costeffective and energy efficient way of generating electricity. Disadvantages: Coal has the most waste problems of all energy sources.
Coal: Coal, one of the most important primary fossil fuels, a solid carbonrich material, usually brown or black, that most often occurs in stratified sedimentary deposits, which may later be subjected to high temperatures and pressures during mountain building, resulting in the development of anthracite and even graphite.
Warming caused by burning coal in a power plant can be felt in the atmosphere within 95 days—the time it takes for the emissions released from the plant to trap enough heat to exceed the amount generated from the plant itself, according to the study.
It estimates that coal burning in China was responsible for reducing the lives of 260,000 people in 2011. It also found that in the same year it led to 320,000 children and 61,000 adults suffering from asthma, 36,000 babies being born with low weight and was responsible for 340,000 hospital visits and 141 million days of sick leave.
• "Clean coal" usually means capturing carbon emissions from burning coal and storing them under the earth. • Carbon capture and storage works, but is expensive to build or to retrofit onto old plants. • We'd need to do a lot more capturing and storing to make a difference in battling worldwide carbon emissions.