Climate change is the greatest environmental disaster that earth is facing. It is a change in statistical distribution of weather over periods of time.It is also social and economic threats. Climate change is due to human activities such as pollution, industrial wastages and it affects all the living organisms of earth.Harmful gases from industries, wastages and other pollutants are main causes for climate change. There main impacts of climate change are greenhouse effect, global warming,unexpected rainfall. The snow of mountain is melting due to global warming. Over rain fall in many places is ruining peoples life.
If we will be concerned about the impacts of climate change then it will be easy to reduce the effects. It has already started. Many people are facing the effects of land slides and many more are dying.Many are facing starvation because it also harms the growth of crops. climate change leads the country and people of world to poverty.

Pollution is the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem as well as to the living organisms.Pollution can be of chemical substances,or energy,such as noise, heat or light or air and water.Pollutants maens the the elements of pollution.These elements can be foreign substances or energies or naturally occurring elements.When they are naturally occurring they are called contaminants.These pollutants can mix up with air, water, soil and causes pollution.

It was the industrial revolution that gave birth to environmental pollution.The emergence of great factories and consumption of immense quantities of coal and other fossils fuels gave rise to air pollution and the large volume of industrial chemicle discharges added to the growing load of untreated human waste.

The release of harmful chemicals lije CFC,carbonmono oxide,sulphur dioxide in air is air pollution.Main reasons for this is industries and vechiles. The release of waste products and contaminants into river, drainage systems, leaching into groundwater, liquid spills, wastewater discharges into water resources is watr pollution.

Soil pollution ouccurs due the release of chemicals into soil, over use of pesticides, insectisites and chlorinated hydrocarbons.Soil pollution cause decrease in ferility of soil.

Roadways noise, industrial noise and sonar intensities causes noise pollution.This causes deafness in human.Natural and man made sources causes other pollution like visual pollution,thermal pollution and light pollution.

These pollution causes respiratory diseases,throat inflammation, chest pain, and congestion. Water pollution causes approximately 14,000 deaths per day, mostly due to contamination of drinking water by untreated sewages.

To protect environment from adverse effect of pollution ie global warming many rules should be followed.Pollution control is a term used in environmental management. It means the control of pollutants into air, water or soil. Without pollution control, the waste products from consumption, heating, agriculture, mining, manufacturing, transportation and other human activities, whether they accumulate or disperse, will degrade the environment. In the hierarchy of controls, pollution presevation and waste minimization are more desirable than pollution control.

A population is the collection of inter-breeding organisms of a particular species.population of a country should be checked.Unchecked population growth is speeding climate change, damaging life-nurturing ecosystems and dooming many countries to poverty.Birth rates should be lowered sharply to controll population.Voluntary family-planning programmes are good ways for it.The researchers has warned that the tally of humans on Earth could swell to an unsustainable 11 billion by 2050 if the birth rates grow on the same ratio.
The UN currently projects that global population will rise from 6.8 billion today to between 8.0 and 10.5 billion by mid-century.
The researchers said that with one and a half million more humans climbing aboard the planet every week, a recipe is looming for ecological overload, famine and broken states.Over population leads to drastic change in climate and eco-system.It leads to poverty,starvation,poor health,pollution and global warming.Continous over growth of population in least developed countries leads to ecnomic crisis,a failure of education and conflict
The unsustainable growth of population is exhausting convectional energy supplies,accelerating environmental pollution and global warming. This leads to natural calamities like acid rain and harmful diseases.The main quiery is that how can a country feed its 127 million population.
Many countries like China is applying 'one-child policy' to rediuce population.Some of the Muslim countries accep children as gift of god so they don't accept the family planning that increases the population. All women must be protected from unintended birth to controll population.

The population of world is increasing rapidly.And there basic needs is also increasing as well.To fulfill there requirements forests are being cleared.many factories are being established.There are more oppertunities in the urban areas than in rular areas.so people migrate to uran areas to grab more oppertunities.The migration of people permanently to the better areas for good income,better health,education facilities is urbanisation.

The urbanisation in Nepal is increasing more rapidly.many people from mountain and himalayan region migrate to terai region.Terai is plane and fertile and comparitively more suitable for agriculture.but these land are being used for factories. More hospitals, educational institute are established in terai than in mountain region.so tom get these oppurtunities they permanently settle to terai.

Nowadays the capital city our country,Kathmandu has become victim of urbanisation.All types of facilities are more here than any other places.so these days Kathmandu is being over crowded and pollution is also increasing.The smoke thrown out by the factories and vechiles affects our health and causes many dreadly diseases.Urbanisation should be controlled to controll the pollution.

all living and non living creature survive on earth. It is our common home.It is important to keep our home clean ie to save our earth.environmental pollution directly affects on human health. The situation of global warming is also due to environmental pollution.