Global worming and its effect.

The earth's climate is constantly changing. This is not a part of the normal cycle of events on this planet. Most scientists agree that there are drastic changes occurring that are due to unnatural global warming. The weather is getting decidedly warmer. For the most part, the United States has already warmed up some. In some places, the average rise in temperature is around four degrees Fahrenheit. Ice is melting due to worming
However, all the states show some degree of warming. Because of global warming, storms are becoming more destructive. While there have certainly been droughts, rainfall totals have risen in the past century.The number of times it rains in a year has increased during the last 50 years due to global warming. This effect is not a zonal effect.It will suffer all of us.The main cause of global worming is said to be the increase of environmental polution occure by the industries and other CFC(Cloro Floro Carbon),CO2(Carbon Die Oxide)generator devices.
Due to this the ice of Antertica is melting as a result the hight of water level of see is increasing day by day. You can get more about this by clicking this link.

Pollution makes river of Bangladesh waters hard to treat

Water of the Buriganga and Shitalakhya rivers has become difficult to treat due to high level of pollution, said Dr MA Taher Khandker, director general of Bangladesh Haor and Wetland Development Board at a seminar.
“Water in the Buriganga and Turag rivers have literally turned into poison,” said Khandker in his presentation at the seminar titled 'Pollution of Rivers around Capital Dhaka: Mitigation Options' at Water Development Board (WDB) office.
Dissolved Oxygen (DO) level, an indicator of measuring river health and aquatic life in its water, stands at zero milligram (per litre) at different points of Buriganga, Turag, Tongi Khal and Balu during dry season, he said.

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Pollution from pesticide and effect on Health

More than 47% of farmers in Bangladesh use more pesticides than needed to protect their crops, according to a recent survey of 820 boro (winter rice), potato, bean, eggplant, cabbage, sugarcane and mango growers.
Among them more than 87% freely admit to using little or no protective measures while applying pesticides.
54% of the traders report frequent health symptoms commonly associated with acute pesticide poisoning.
92% freely admit that they don't take any protective measures while handling pesticides.The improper use of this pesticides cause serious pollution in water.This pesticides mix to the surface and underground water.After a short circle it comes to our body causes health damage.

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Dhaka city become Poisonous gas chamber

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Dhaka city is turning again into a poisonous gas chamber causing serious threat to public health. According to a media report, pollution of air in the city with toxic particles has exceeded permissible limits in some areas. In some case its exceed the limit of toxic particles used in the gas chamber in Second World war(!).The main toxic particles present in air is led(Pb) ,Carbon monoxide (CO) ,Hydrocarbons (HC),Oxides of nitrogen (NOx), NO2,Diesel emits suspended particulate matter (SPM) which contains shoot. Shoot is responsible for reduction of atmospheric visibility and absorb and carry organic compound to lungs. This particles are dangerous threat to the human life.Air is polluted mainly from exhaust of cars and of course from industries.

Water pollution in Buriganga

The capital of bangladesh Dhaka situated on the bank of the river Buriganga.The water of Buriganga is polluting by Industial waste and capital sewage which cause her to become biologically dead.

Tannery west mainly contaminating the river.Around 20,000 cubic meters of untreated highly toxic liquid waste flow in to the Buriganga through canals on a recent report.

The use of fertilisers in Cultivation and its effect.

Farmers use fertilizers which contains nutrients to maintain productivity.Plants need nutrients carbon dioxide (CO2)and water (H2O)for photosynthesis.Micro nutrients are needed in very small amounts.When plants are harvested the nutrients are removed with them.In a natural ecosystem the plants would eventually die and decay, with the nutrients being returned to the soil.Farmers can use organic fertilizers or inorganic fertilizers.

Inorganic:

1. Manufactured e.g. ammonium nitrate.
2. Has concentrated amounts of macro nutrients.
3. More easily leached from the soil.
4. Can be applied in smaller amounts as it is concentrated.
5. Easy to handle and spread on the fields.

The pollution of rivers by Industrial Wastages

The atmosphere, rivers, lakes and underground stores hold less than 1% of all the fresh water and this tiny amount has to provide the fresh water needed to support the Earth's population. This water is mainly polluting by this.

a) Fertilisers
b) Industrial Waste
c) Oil Pollution
d) Warm Water

The pollution of rivers by Industrial Wastages

In both developing and developed country industrial wastages polluting the river.Its become a matter of concern how to get rid of this problem.In most of the case the wastage management system in the industry is very poor.The industrialist don’t think about the natural digester caused by them.Its true that for the prosper of mankind industry is essential.We have no alternate of it but proper management of the wastage can be a solve of this problem.

The following articles will prove my words.

Pollution turns Chinese river red

Water supplies to about 200,000 people in central China have been contaminated by pollution, which has turned branches of a major river system red. State media reported high levels of chemicals in the water.The Xinglong, Tianguan and Dongjing rivers were all affected by the pollution, according to the state news agency Xinhua.A chemical spill is thought be the cause, but the source has not yet been identified and an investigation has been launched.