consumption – n. the use of something

inventory – n. an unsold supply of a product that are stored in a place

cost-effective – adj. providing a good result at a relatively low cost

shale wells – n. wells that recover oil from shale, a kind of rock that is easily broken

alignment – n. being in line with, matching or being in balance with something else

renewable energy – n. energy produced from a source that cannot run out, such as the sun, wind or water
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