forbidden word(s): clean energy

clean adj. 1 Put on a clean shirt. I like a clean room: unsoiled, spotless, immaculate, sanitary, unblemished, unspotted; cleaned, cleansed, washed, scrubbed, bathed, scoured, laundered, fresh; neat, tidy, orderly. 2 The cabinetmaker did a clean job: perfect, flawless, faultless, neat, fine, trim, well-made. 3 In the country we breathed clean air: unpolluted, pure, clear, uncontaminated, unadulterated, untainted, uninfected, undefiled. 4 He leads a clean life:  wholesome, honorable, upright, virtuous, moral, decent, decorous, innocent, healthy, chaste, unsoiled, exemplary, untainted, stainless, unsullied, unblemished, unspotted.
—v. 5 The curtains cleaned beautifully. Clean your room before going to school: cleanse, wash, scour, scrub, launder, bathe, shampoo; sweep, vacuum, mop, dust; tidy, tidy up, order, neaten.
Ant. 1 dirty, filthy, soiled, stained, spotted; unwashed, unbathed, messy, untidy, disorderly. 2 flawed, imperfect, faulty, crude, ragged, awkward, sloppy, messy. 3 contaminated, polluted, impure, infected, tainted. 4 unwholesome, dishonorable, indecorous, immoral, indecent, stained, unhealthy, tainted, sullied, blemished; evil, wicked, depraved. 5 soil, dirty, stain; mess up, disorder.

from – Family Word Finder: Reader’s Digest. The Reader’s Digest Association, 1975.

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energy n. 1 The new power plant supplies energy for the entire city: power, force; (variously) hydroelectric power, electric power, atomic energy, nuclear energy. 2 Even after hours of work his energy never seems to give out: vitality, vim, vigor, verve, pep, go, vivacity, liveliness, animation, zest, zeal, enterprise, drive, hustle.
Ant. 2 inertial, lassitude, listlessness, sluggishness.
◊ Word Origin: Energy  comes from Greek energeia, vigor of expression, activity. The word was coined by the philosopher Aristotle from the word elements en– (in) + ergon (work). A century or so after Aristotle the term hai energeia, expressing the concept “cosmic forces,” entered Western thought through the popular occult writings of a group of philosophers centered in Alexandria, Egypt. The psychological meaning of energy, “vigor or intensity of action,’ was introduced to out language int eh19th century by the poet Samual Taylor Coleridge; the scientific meanings of the word have sprung up over the last 150 [200] years.

from – Family Word Finder: Reader’s Digest. The Reader’s Digest Association, 1975.

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“Clean energy” usually refers to energy sources that produce no climate-warming greenhouse gas emissions in their operation. That doesn’t mean they have zero impact on the environment.

The group of technologies widely considered to be “clean energy” include hydropower, geothermal, solar, wind, nuclear, bioenergy (at least in some circumstances), and even some extremely nascent technologies like ocean wave power. These energy sources are “clean” with regard to climate change because—unlike fossil fuels—when they produce energy they do not emit greenhouse gases, the type of pollution that is warming our planet. The most important of these gases is carbon dioxide (CO₂), so “clean” technologies can more precisely be referred to as low-carbon or carbon-free.

Clean energy technologies are in many ways very different from one another, but none directly emit CO₂.¹

from – What is “clean energy”? Is any kind of energy completely clean? | MIT Climate Portal

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example sentences: clean energy