476 videos|360 docs
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1. What are the primary sources of coal and petroleum? | ![]() |
2. How is coal extracted and processed? | ![]() |
3. What are the environmental impacts of coal and petroleum usage? | ![]() |
4. What are the major uses of coal and petroleum? | ![]() |
5. What are the alternatives to coal and petroleum? | ![]() |
476 videos|360 docs
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