Soyouthinkthatbystayingathomeyouaresafefromalltheterriblekindsofpollutionpresentoutdoors,suchasinornearfactories,roads,andgarbagedumps?Doyouthinkthatbystayinginyourofficeyouarebreathingcleaner,saferairthanwhen

Question

So you think that by staying at home you are safe from all the terrible kinds of pollution present outdoors,such as in or near factories,roads,and garbage dumps?Do you think that by staying in your office you are breathing cleaner,safer air than when you go outside for lunch or are on the way back home from work?Think again.Recent research done at the University of Texas has shown that staying indoors may actually be more harmful to one's health than being outdoors even in smoggy cities.
（你是否认为待在家里就可以摆脱户外那些像是工厂、马路及垃圾场附近种种可怕的污染?你是否以为待在办公室内,你所呼吸的空气就比你外出吃午餐或下班回家路上来得干净、安全呢?再仔细想想吧.最近德州大学所做的研究显示,即使是在烟雾弥漫的城市里,待在室内可能比待在户外对个人健康的危害更大.）
第一句So you think that by staying at home you are safe from all the terrible kinds of pollution present outdoors...中的present如何理解,如果是动词的话应该是presenting或者presented吧,如果是形容词的话好像又不好理解.

Answer 1

是形容词,存在的
Existing in something specified:
存在的：存在于某特定物体内的：
Oxygen is present in the bloodstream.
有氧气存在于血管中