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Airborne particulate matter can be a complex mixture of organic and inorganic substances which might be divided into two groups: coarse and fine particles. The fine particles include formed aerosols (gas that looked to particles), combustion particles, and metal vapors. The large particles are items like dust in the road or a factory. The fine particles are the ones most directly associated with acid rain and people are the ones we are likely to deal with today. They have one of the most relevance on the new laws in California regulating the emissions from semi-tractor trailers. While Santa Cruz is not a big city, you will find there's major artery, highway 1 which runs through our lovely ocean side communities in addition to mining in high altitude which generate particulates too. As day by day Gurgaon city developing and on another side, the population and mob of people increase. If you see seriously towards it then it is a very hazardous problem for future. Many stable people have their own property or houses and so many students and family moving to Gurgaon for a reason so to get property or rent a home is difficult.