Climate Change(A Short Overview)

Hi Friends! Welcome to my personal blog. Although it is a personal blog but I think it concerns globally and especially for Nepalese as we are one of the most vulnerable with this hazard situation(effect of climate change) than others in the globe.

Climate Change
I think you all are familiar with this term. But this needs to be explained to those who do not know about this and to those as well who are pretending of not knowing anything about this.
First of all I would like to introduce you the two terms: weather and climate
Do you find any differences between those two terms??? obviously not, right!
No..... but there is Man!
Weather is that what it happens, and Climate is that what we expect!
Yeah... there is the difference.
Normally, we expect Raining in Rainy Season and we wear woolen clothes in Winter Season. These are the phenomena of our climate.
But..... If you were in Nepal and other places around South Asia then you probably have felt that the Monsoon came late this year....... yeah that's the weather or you can also say this as a changed climatic condition, abnormal climatic condition, extraordinary one etc........
So, here some questions may arise in our mind... right?
1. Why is our climate changing?
2. What is the effect of climate change?
3. What can we do to either stop or mitigate this hazard?
4. Who is responsible of this hazard situation? and so on.....

So, here we try to find the answer of all those questions.

GREENHOUSE EFFECT
Many people regard the enhanced greenhouse effect as the most serious environmental threat to our present way of life on Earth. The greenhouse effect is the natural 'trapping in' of heat by gases such as carbondioxide and methane in atmosphere. By allowing short-wave radiation in, but trapping some of the long wave radiation which is trying to get out, these gases act in a similar way to the glass in a greenhouse(I think most of us have seen the greenhouse), hence the term greenhouse effect.
Without the greenhouse effect the average temperature on Earth would be about -17 degree celcius and life on Earth as we know it would be impossible. The problem is that over the last few hundred years human activities have resulted in rising concentrations of many of the greenhouse gases. This has led to an increased or 'enhanced' greenhouse effect which, in turn, has led to an increased average global temperature. We now know that the mean global temperature has risen by 0.3 to 0.6 degree celcius over the last hundred years. Some scientists have estimated that if we do nothing to reduce greenhouse gases emissions, the average global temperature will rise by 0.3 degree celcius every decade.

Some Greenhouse Gases:
Water vapour is, in fact, the most effective greenhouse gas but its concentration in the atmosphere is not directly affected by human activities.
Carbondioxide:
Anthropogenic release of carbon dioxide contributes most to the enhanced greenhouse effect. All fossil fuels, such as coal and oil, contain carbon;burning them releases carbon dioxide. As world demand for energy increases, so more fossil fuels are being burnt, here CO2 levels are rising.
Chlorofluorocarbons:
CFCs have been used as coolants in refrigerators, as propellents in aerosols and as expanders in expanded foam products. Their increasing concentration in the atmosphere over the last two decades reflects their wide usage.The Montreal Protocol(1987) has led to a huge decline in the production of CFCs but, unfortunately, CFCs that have already been released into the atmosphere will stay there for many decades.
Methane(CH4)
Methane is produced by anaerobic bacteria which live in marshes, landfill sites, rice paddies and in the guts of ruminants(for example, cattle, sheep, camels). A cow may release a phenomenal 200 liters of Methane a day! Atmospheric Methan concentrations have risen as the ruminant population and the area given over to the landfill have significantly increased. Leaking gas pipes and coal mines also release methane.
Nitrogen I oxide(N2O)
Nitrogen I oxide is released during fossil fuel combustion and from denitrifying bacteria which act on nitrates and nitrites. Increasing use of nitrate fertilizers and increasing cultivation of soils may be resulting in increasing concentrations of Nitrogen I oxide.
Tropospheric Ozone(O3)
Tropospheric Ozone is produced through a complex series of reactions involving pollutants from car exhausts, such as Nitrogen I oxide, and hydrocarbons, which react with sunlight. Thus, more vehicle use means a greater greenhouse effect.

Believe it or not!

• The emission of Greenhouse gases for 142 Nepalese people are equivalent to 1 American

BUT

• Nepal is one among 20 most vulnerable countries due to the probable impacts of CLIMATE CHANGE
• There are 20 risky glacier lakes in Nepal, vulnerable of GLOF(Glacier Lake Outbrust Force)- See the above picture of Imja Glacier Lake(One of the vulnerable glacier lake of Nepal).