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Dams and reservoirs are required ______ to store water during periods of surplus water availability.

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The ______ of around 40% of the world’s forests has serious impacts on over 1 billion people who live in and around forests.

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The use of biofuels helps to achieve energy ______ as it helps reduce the dependence on foreign oil for some countries.

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Fossil fuels like coal, oil and natural gas account for 81% ______ the total energy used in the USA.

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Energy plays a key role for ______ development of a country.

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In the United States, fossil fuels were the main source to ______ about 60% of total electricity generation in 2020.

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Climate scientists are discussing the ______ of the Amazon rainforest deforestation.