Roj Kev Paub - Carbon Dioxide
Vim li cas dej qab zib fizz thaum koj qhib nws? Vim li cas cov nroj tsuag tuaj yeem "noj" hauv tshav ntuj? Cov nyhuv tsev cog khoom tau dhau los ua hnyav dua, thiab tag nrho lub ntiaj teb tab tom tswj cov pa roj carbon emissions. Puas yog carbon dioxide tiag tiag tsuas muaj kev phom sij?
Carbon dioxide yog denser tshaj huab cua, muaj peev xwm yaj nyob rau hauv dej, thiab yog ib tug tsis muaj xim, tsis muaj ntxhiab roj nyob rau hauv chav tsev kub. Nws muaj ob qhov xwm txheej: nws yog "khoom noj" rau cov nroj tsuag hauv photosynthesis, tab sis nws tseem yog "tus neeg ua txhaum" tom qab lub ntiaj teb sov sov, ua rau lub tsev cog qoob loo. Txawm li cas los xij, hauv cov haujlwm tshwj xeeb, nws ua lub luag haujlwm tseem ceeb.
Hauv kev tua hluav taws, nws yog tus kws tshaj lij ntawm kev tua hluav taws! Lub tshuab tua hluav taws carbon dioxide tuaj yeem cais cov pa oxygen sai sai thiab tso tawm hluav taws xob thiab roj hluav taws xob, tig qhov xwm txheej txaus ntshai mus rau kev nyab xeeb hauv lub sijhawm tseem ceeb.
Hauv kev lag luam khoom noj khoom haus, nws yog "tus tsim npuas ua npuas ncauj"! Cov npuas hauv cola thiab Sprite tshuav lawv lub neej rau CO2, thiab cov dej khov qhuav (cov pa roj carbon dioxide) yog siv rau cov tub yees, khaws cov khoom tshiab tsis tu ncua thaum lub sijhawm thauj mus los ntev.
Hauv kev tsim tshuaj lom neeg, nws yog ib qho tseem ceeb raw khoom! Nws koom nrog hauv kev tsim cov dej qab zib tshauv thiab urea, thiab txawm pab "tig pov tseg rau hauv cov khoom muaj nqis" - los ntawm kev cuam tshuam nrog hydrogen los ua ke methanol, txhawb zog ntsuab.
Tab sis ceev faj! Thaum cov confentration carbon dioxide nyob rau hauv huab cua ntau tshaj 5%, cov neeg tuaj yeem muaj kiv taub hau thiab ua tsis taus pa; tshaj 10%, nws tuaj yeem ua rau tsis nco qab thiab ua tsis taus pa. Thaum cov pa roj carbon dioxide ntsiag to txhawb lub neej raws li cov khoom siv raw rau cov nroj tsuag photosynthesis, nws kuj yog ib qho tseem ceeb rau kev nyab xeeb thoob ntiaj teb. Tau ntsib nws ob qhov xwm txheej, tib neeg yuav tsum tswj cov pa tawm kom tswj lub ntiaj teb "ua pa sib npaug."
