something about air pollution
2 August 2009 by wendeng
Sorry for delaying, I already have try my best, it just like a sort of bird langrage 
Essay on ‘Urban aerosols harbor diverse and dynamic
bacterial populations’
This article is focus on the diversity and dynamic bacterial populations in the air. Finally, they demonstrate that temporal and meteorological influences are stronger than location in shaping the biological composition of air we breathe.
It brings me a concept that bacterial population is connected with air pollution after reading this article, nowadays, a number of problems are caused by the environmental contaminations, such as the overuse of the energy, cutting forests which cause lacking of O3 and destroy the ozonosphere that can protect human body form UV radiation. More over, as the economics increases, we will face more critical health problems. Lots of plants trees and corps are destroyed by bad air. Many fish die of poisonous water. Thousands of people get chronic disease or even worse, they die from eating poisoned fish or breathing in poisonous gas . Farmers make use of great amounts of insecticides to have bumper harvests. However, they pollute air, water and land. Plants produced natural ‘pesticides’ in which human diet contains. This is to protect themselves from insects and other predators. It has been proved that many plants can concrete some kind of chemical molecular which can protect human from cancer or improve our health. Therefore, environmental pollution should be responsible for these diseases that are disabling, or bringing death not only to human beings, but also to wild life.
The existence of bacteria in the atmosphere is important because they may spread diseases. From literature, at temperatures of −1 °C, some certain species of bacteria can affect ice nuclei which can be found living on plant leaves and the surface layer in the ocean. Because of that the bacteria can be easily transported into the air.
Also, it has been proved that aerosols bacterial populations have influence on the dental problems. For a long time, spread of infections is considered as the mainly concerns in the dental community. Actually, it’s not only in dental community, but also in all kinds of medical problems. Indeed, infectious can be easily transmitted to patients and by the instruments and air. But bioaerosols are an important consideration for infection control and occupational health, if more bacteria suspended in the air, more chances to get infection through this agent. Also, the air is made up of different kinds of bacteria, some of them may cause allergens and some are even toxic substances Infective causative agents may include bacteria, viruses, fungi, and possibly even prisons.
From above, we can find that aerosols bacterial populations are closely related to human health. I think there are four reasons to explain why environmental contaminations are affect our health, the primary is the reason of harmful substances into environment. For example, to prevent insects, farmers make use of great amounts of insecticides, so as to have bumper harvests. However, they pollute air, water and land. Second, the gas coming from the car engines and factories also make environment polluted badly. The third reason actually is the result of a growing population in the world. Everyday, so much litter and waste are poured out from houses, and the other problem it has brings is over-consumption which can pollute the circumstances we live. The significance for controlling pollution noted that it’s high time that more effective measures should be taken. Therefore, new laws should be passed to limit the amount of pollutants from factories. Moreover, in the households; there is an obvious need to reduce litter and waste. We should do something such as planting more trees, equipping cars with pollution-control devices and learning to recycling natural resources to improve the present situation, let’s make our good efforts, and the world will be a safer place to live for us. I do believe everything will be better in the future.
References:
1. Ames BN, Gold LS, FASEB JOURNAL, 11:1041-1052
2. Mihály Pósfaia, , , Jia Lib, James R. Andersonc and Peter R. Buseck, Aerosol bacteria over the Southern Ocean during ACE-1.
3. J Contemp Dent Pract 2004 November;(5)4:091-100.