Why was the discovery of high temperature superconductors so startling to scientists?

Because they can use those superconductors to make even better circuits and make even better discoveries like its melting point

Explanation:

They are 100 percent efficient because current zooms through them with zero energy loss: The pinball machine turns into a super highway! ... That puts a limit on how much you can do with these "low-temperature" superconductors. Yes, they are super — but only to a point

Explanation:

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acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.