As we are studying noise pollution , i am gonna share some information about it !

Noise health effects are the health consequences of elevated sound levels. Elevated workplace or other noise can cause hearing impairment,hypertension, ischemic heart disease, annoyance, and sleep disturbance. Changes in the immune system and birth defects have been attributed to noise exposure.

Although some presbycusis may occur naturally with age, in many developed nations the cumulative impact of noise is sufficient to impair the hearing of a large fraction of the population over the course of a lifetime. Noise exposure also has been known to induce tinnitus, hypertension, vasoconstriction, and other cardiovascular adverse effects.

Beyond these effects, elevated noise levels can create stress, increase workplace accident rates, as well as stimulating aggression and other anti-social behaviors. The most significant causes are vehicle and aircraft noise, prolonged exposure to loud music, and industrial noise. In Norway, road traffic has been demonstrated to cause almost 80% of the noise annoyances reported.

There may be psychological definitions of noise as well. Firecrackers may upset domestic and wild animals or noise-traumatized individuals. The most common noise-traumatized persons are those exposed to military conflicts, but often loud groups of people can trigger complaints and other behaviors about noise. Infants are easily startled by noise.

The social costs of traffic noise in EU22 are more than €40 billion per year, and passenger cars and lorries (trucks) are responsible for bulk of costs.Traffic noise alone is harming the health of almost every third person in the WHO European Region. One in five Europeans is regularly exposed to sound levels at night that could significantly damage health.

Noise also is a threat to marine and terrestrial ecosystems.

I have to share it earlier because I am away in the date I am sharing . So here is an interesting website with pictures that shows and explains noise pollution. By: Emily

http://app.mewr.gov.sg/web/contents/Contents.aspx?ContId=1699

So please stop hurting our planet ;(

Air Pollution Now Threatening Health Worldwide

Humanity is losing the battle for clean air. Despite decades of efforts to combat it, air pollution is taking a growing toll on human health, the environment, and the economy, according to a new Worldwatch Institute study.

Once primarily an urban phenomenon in industrial countries, air pollution has spread worldwide. More than a billion people--one-fifth of all humanity--live in communities that do not meet World Health Organization air quality standards.

In greater Athens, the number of deaths rises sixfold on heavily polluted days. Mexico City has been declared a hardship post for diplomats because of its unhealthy air. In Bombay, simply breathing is equivalent to smoking half a pack of cigarettes a day.

"The technological solutions tried to date have been inadequate, their gains often negated by growth," according to Hilary F. French, a Researcher at the Washington, D.C.-based organization and author of Clearing the Air: A Global Agenda. "Restoring air quality depends on restructuring the energy, transportation, and industrial systems that generate the pollutants."

In the U.S., air pollution causes as many as 50,000 deaths per year and costs as much as $40 billion a year in health care and lost productivity.

Around the world, Milan, Shenyang, Tehran, Seoul, and Rio de Janeiro reported the worst levels of sulfur dioxide--a pollutant directly harmful to humans. Paris and Madrid also made the top 10 in the list, produced by a U.N. monitoring network.

Global Killer - Pollution

By Yujian

Pollution

In class,we are talking about ''Pollution'' in class recently.Land pollution,water pollution and air pollution,and there is a solution to it.

The world's tropical forests contain huge quantities of carbon dioxide,a greenhouse gas that causes climate change.When they are destroyed for farmland or other purposes,they release their carbon prematurely and in quantities greater than all world's cars,trucks and planes combined.The result is changing rainfall patterns,rising ocean levels and increased drought.Tropical forests are also home to most world's threatened species,many found nowhere else.

One of the quickest and most co-effective ways to reduce global carbon emissions is to conserve tropical forests.And when we do,we also:-

• Protect the natural habitat of many threatened and endangered species.

• Preserve the livelihood and incomes of local communities.

• Curb climate changes.

Over the past three years Conversation International,in conjuction with our partners,has conserved 143 millions acres of tropical forest - equivalent to talking 10 million cars off the road.

By ~ SeeHx

http://www.simplyrecipes.com/recipes/ham_and_potato_hash/
http://www.simplyrecipes.com/recipes/fancy_hot_dogs/
http://www.simplyrecipes.com/recipes/german_farmers_breakfast/

The process of Desalination

by :S K