Pollution harms the balance between organisms in ecosystems, which creates problems for us all. It generates harmful materials to distribute into the environment, causing many food webs and food chains to die. Air pollution is releasing gases into the atmosphere and theses gases are called greenhouse gases. The gases are getting trapped in the ozone layer of Earth and causing
Destroying the world to survive: POLLUTION Background The presence and use of substances that are harmful and poisonous to the environment, especially being contained in the water, air and soil are factors that contribute to destroying the environment. Pollution continues to be an important public health concern in our societies. Since the development of Industries within the societies our environment and health conditions have been endangered by the high levels of pollution. The sudden increase in population has led to many informal and unhealthy polluted settlements. Though there are types of pollutions, it has come to my senses that the societies that we live in today are in danger of facing all kinds of pollutions because we human beings contribute to the environment being polluted.
When liquids and other materials begin to degrade, they release a juice that can be toxic if consumed. Leachate can not only be stored by the soil and make it less fertile, but also contaminate the source of water that is close by. This liquid can completely ruin the whole water system for those that depended on it. Water pollution has increased over the last couple of years and “in the U.S. 40% of rivers and lakes are considered too polluted to support normal activities”
These heavy metals are not biodegradable, i.e. they cannot be reduced to simpler form and therefore pose great threat to human health and ecosystem.  Heavy metals such as cadmium, copper, lead, mercury, nickel and zinc are declared the most hazardous and toxic metals, and they are listed in the EPA list of priority pollutants. The increased concerns on the environment and health and the strengthened regulations demand more strict treatment of water and waste
There is on-going regulatory and research concern for metals in the environment and numerous regulations have been implemented globally to control or curtail natural and anthropogenic industrial metal emissions. Contaminants are the substance that can endanger the environment, humans, animals, plants, soil or water (Hoffmann, 1998). Human impact on the environment or anthropogenic impact on the environment includes impacts on biophysical environments, biodiversity and other resources (Sahney et al 2010; David and Alan 2008). The term anthropogenic designates an effect or object resulting from human activity. The atmospheric scientist Paul Crutzen introduced the term "anthropocene" in the mid-1970s (Crutzen et al 2000).
This wastewater commonly includes Cd, Pb, Cu, Zn, Ni and Cr (Argun and Dursun, 2008). Whenever toxic heavy metals are exposed to the natural eco-system, accumulation of metal ions in human bodies will occur through either direct intake or food chains. Therefore, heavy metals should be prevented from reaching the natural environment (Meena et al, 2008). In order to remove toxic heavy metals from water systems, conventional methods have been used such as chemical precipitation, coagulation, ion exchange, solvent extraction and filtration, evaporation, membrane methods and activated carbon adsorption (Panayotova and Velikov, 2003). However, most of these processes are expensive, complicated, ineffective at low metal concentrations and inapplicable to a wide range of pollutants (Kurniawan et al, 2006).
1 INTRODUCTION Environmental pollution is one of the worldwide growing threats to human health and natural resources. One major cause of environmental degradation is air pollution due to natural and manmade sources. The main impacts of air contaminants include ground- level ozone, acid rains, greenhouse effect, climate change, ozone layer depletion and adverse health hazards. Benzene and toluene are organic compounds found in indoor air as a result of emissions from burning coal and oil, some household products which contain petroleum based chemicals like glues, paints, etc. Outdoor sources are like gasoline vapors at gasoline service stations, motor vehicle exhaust, emissions from industrial sources utilizing benzene and toluene, etc.
The most dangerous pollutants are bioactive chemicals, due to which the micro-organisms of climate and soil are being destroyed resulting in decreased quality of soil. Toxic chemicals enter the diet chain, so that they reach up to the top
Studies on the relationship between air pollution and reducing species diversity clearly show the detrimental effects of environmental contaminants on the extinction of animals and plants species. Air suspended toxicants may also cause reproductive effects in animals. Acid rain, temperature inversion, and global climate changes due to the emissions of greenhouse gasses to the atmosphere are other major ecological impacts of air pollution. AIR POLLUTANTS AND THEIR TOXICITY Every material in the air which could affect human health or have a profound impact on the environment is defined as air pollutants. According to the World Health Organization (WHO), particle pollution, ground-level O3, CO, sulfur oxides, nitrogen oxides, and lead (Pb) are the six major air pollutants which harm human health and also the ecosystem.
Water plays the most important role in current ecosystem. If it have problem, it will affect the entire existing ecosystem. One of the major problems in water pollution is heavy metals. Water pollution heavy metals in water could affect the human through the bioaccumulation and bio-augmentation in food chain(Gonin and Serin, 2011 ;Neto et al., 2012). The major that cause the factor of heavy metals entry into the water colum is due fast industrialization and urbanization.