1. High carbon content- Anthracite
Explanation- Anthracite is the form of coal which contains highest carbon content. It contains 80% carbon content.
2. Renewable resource- Wind
Explanation- Wind is a resource which is replenished from time to time and does not require million of years for its formation. Since it is replenished and can be used again and again it is termed as a renewable source of energy.
3. Low sulphur content- Natural gas
Explanation- Natural gas has very low sulphur content which makes it least polluting source of fuel.
4. Formation of soil- Weathering of rocks
Explanation- Soil is formed from weathering of rocks over a period of time.
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