Dab tsi yog cov ntsiab lus thiab tsis muaj ntsiab lus?
Dab tsi yog cov ntsiab lus thiab tsis muaj ntsiab lus?

Video: Dab tsi yog cov ntsiab lus thiab tsis muaj ntsiab lus?

Video: Dab tsi yog cov ntsiab lus thiab tsis muaj ntsiab lus?
Video: Hai txog niam txoj kev hlub, muaj nqis npaum li ca 2024, Kaum ib hlis
Anonim

United States Environmental Protection Agency (EPA) txhais point qhov chaw muaj kuab paug raws li tej yam kab mob uas nkag mus rau hauv ib puag ncig los ntawm ib qho yooj yim txheeb xyuas thiab kaw qhov chaw. Tsis muaj ntsiab lus - qhov chaw pollution yog qhov opposite ntawm taw tes - qhov chaw muaj kuab paug, nrog cov pa phem tso tawm hauv ib cheeb tsam dav.

Ib yam li ntawd, dab tsi yog ib qho piv txwv ntawm qhov chaw tsis muaj kuab paug?

Nonpoint qhov chaw muaj kuab paug tuaj yeem suav nrog: Cov chiv ntau dhau, tshuaj tua kab thiab tshuaj tua kab los ntawm thaj av ua liaj ua teb thiab thaj chaw nyob. Roj, roj thiab tshuaj lom neeg los ntawm kev siv hluav taws xob hauv nroog thiab kev tsim hluav taws xob. Sediment los ntawm qhov chaw tsim kho tsis raug cai, qoob loo thiab hav zoov av, thiab eroding streambanks.

Qhov thib ob, tsis muaj ntsiab lus txhais li cas? Txhais ntawm tsis muaj ntsiab lus .: yog ib qhov chaw muaj kuab paug (xws li dej ntws los ntawm tej liaj teb) uas tsis nyob rau hauv ib qho taw tes kuj: ua pa phem los yog muaj kuab paug uas ua tsis tshwm sim los ntawm ib qhov chaw indentifiable.

Raws li txoj cai, 4 qhov ua tau ntawm qhov chaw muaj kuab paug yog dab tsi?

Piv txwv ntawm qhov chaw muaj xws li kev kho dej phwj tuaj nroj tsuag ; roj refineries; ntawv thiab pulp mills; chemical, tsheb, thiab electronics manufacturers; thiab factories. Kev tswj cov pa phem los ntawm qhov chaw muaj xws li khib nyiab, av, pob zeb, tshuaj lom neeg, kab mob, cov khib nyiab pov tseg, cov hlau hnyav, tshuaj tua kab, thiab lwm yam.

Dab tsi yog qhov point qhov tso tawm?

US Environmental Protection Agency (EPA) txhais point qhov chaw kev ua qias tuaj raws li ib qho kev txheeb xyuas tau qhov chaw ntawm cov kuab paug los ntawm cov pa paug tawm, xws li cov yeeb nkab, kwj dej, nkoj lossis lub Hoobkas haus luam yeeb” (Hill, 1997). Factories thiab dej phwj kho nroj tsuag yog ob hom ntawm point qhov chaw.

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