YSK: 'Forever Chemicals' or chemicals that don't breakdown in your body or the environment, have been used since 1940, may be the biggest environmental disaster our generation (and the world) has to face, and are almost certainly poisoning you right now.
from /r/YouShouldKnow
YSK: "永遠的化學品 "或不會在你的身體或環境中分解的化學品，從1940年開始使用，可能是我們這一代人（和世界）必須面對的最大的環境災難，而且幾乎可以肯定現在正在毒害你。