Q9 of 10 Page 434

What would be most promising sources of energy 40years from now, and why?

As per 2017 data, world crude oil reserve is 1697 thousand million barrels which will last for only next 50 years, so we need too the alternative sources of energy. The other sustainable source of energy is solarenergy, windenergy and other renewable sources of electricity. Solar energy is based on sunlight, which is a renewable source and it is unlimited


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What are non-monetary goals? Give some examples.

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“Sustainability is the capacity to use the resources judiciously and maintain their balance”. Explain the statement.