内容正文:
Week 7 Day 27-31 (04.22-04.26)
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Day 27 Mon.
Artificial light is dangerous for insects, say scientists
In prehistoric times, our ancestors 1. ________ (question) why winged insects were attracted by fire. An old saying describes this attraction 2. _____ being, "like a moth to a flame". A recent study dispels (打消) the notion 3. _____ insects head towards light because they like it. Biologists have reported that insects 4. _______ (draw) to light because it guides them when flying. The scientists said artificial light disorients nocturnal bugs like moths, often to fatal ends. The co-author of the study said all our beliefs about why insects fly toward light "might have been wrong".
The scientists did research in a Costa Rican rainforest. They observed insects flying around artificial lights. Insects usually use the moon to fly in straight lines. 5. ________, around the artificial lights, the bugs became 6. _______(confuse) and flew in arcs. An entomologist said: "Natural sky light…helps maintain proper flight….Artificial sources…can produce 7. ________(continue) steering around the light and trap an insect." This explains why so many insects fly to their death into bug zappers. Artificial light damages insects' abilities 8.______(find) a mate, forage for (寻觅) food, and defend itself against predators.
Day 28 Tues.
The United Nations has issued a stark warning to consumers worldwide. The volume of electronics we are throwing away is creating an "environmental catastrophe". We are disposing of record amounts of "e-waste". The UN defines electronics as anything 1. ______a plug or a battery, and often contains toxic chemicals and substances, such as lead and mercury. E-waste includes 2. _______(discard) cellphones, refrigerators and e-cigarettes. The UN Global E-waste Monitor has reported 3. ______ in 2022, the world generated a mind-blowing 62 million tons of e-waste. CNN said this waste could, "fill more than 1.5 million 40-