Global Warming
Introduction:
Global
warming means an increase in the average temperature of the atmosphere, ocean, and
landmasses of the earth. At present earth appears to be facing rapid warming
which, most scientists believe results from human activities.
Causes
of global warming: Global warming is caused by a buildup of greenhouse gases
in the atmosphere such as carbon-di-oxide and methane which form a sort of
blanket over the earth, trapping heat that would normally escape the
atmosphere. Humans are exacerbating global temperatures through industrial
activity that dramatically increases carbon-di-oxide concentrations in the
atmosphere.
Greenhouse
effect: The greenhouse effect is a recent concept that means the adverse
effects caused by the rise in the temperature in the climate of the world. The
excess of gas, smoke, and other particles emitted by industries, auto engines, and other places is being accumulated at a height in space. This has
created an obstacle for the heat caused by the sun on Earth to spread into
space. As a result, the heat comes back to heat the water on the surface and
the climate. This situation is called the greenhouse effect in scientific
terminology in modern times.
Effects
on our life: Global warming and radical climate change will affect
our life. The effects of growing Carmon-di-oxide emissions already acquiring are
staggering. Hundreds of millions of people around the world are exposed to
increased water stress, decrease air quality in cities increase ocean
acidification. Such a dramatic change in the temperature will result in the
extinction of 30% of species and the loss of 30% of coastal wetlands.
Scientists have made several predictions about how global warming will affect
weather, sea-level coastline, wildlife, and human health.
Effects
of weather: Some experts predict that an increase in global warming
will result in unpredictable weather patterns, including storm surges in which
the world piles up water in low-lying areas storms are expected to be more
frequent and more intense. As global warming heats the surface of the water
hurricane will increase in speed power and severity. More powerful cyclones
will lead to crop damage, power outages, increase risk of food and waterborne
diseases, population migration, and property loss.
Effects
on sea levels: An increase in global warming will likely result in a
rise in sea levels, which could threaten many coastal areas around the world.
As the atmosphere warms, the surface layer of the oceans warms as well,
expanding in volume and thus raising the sea level.
Effects
on animals and plants: Animals and plants will find it difficult to adjust
to the effects of warming because humans will occupy so much land. Under global
warming, animals will tend to migrate toward the poles and up mountainsides, and plants will shift their ranges seeking new areas as old habitats grow too warm.
Effects
on agriculture: Global warming will affect agriculture seriously. The
semiarid tropical farmlands in some parts of Africa may become further
impoverished. Desert farm regions that bring in irrigation water from distant
mountains may suffer if the winter snow pack which functions as a natural
reservoir, melts before the peak growing months. Insects and plant diseases
will increase that afflict crops and woodlands.
Bangladesh
Situation: According to IPCC’s 4th assessment report, it
is projected that by 2100 global sea level would rise in the range of 18cm to
54cm depending on a range of greenhouse gas emission scenarios. Another study
shows that with a 32cm sea level rise 84 percent of the Sundarbans and its
surrounding coastal areas would be deeply updated by 2050 and the entire
Sundarbans may be lost for about a one-meter rise.
Remedial
process: The whole world is worried about the preventive ways for reducing
global warming. To protect the environment developing countries agreed at
recent UN climate change negotiation targets with nationally appropriate
mitigation actions of their own. World Environment Day is observed every
year. In 1992 from 3-14 June a world conference on the environment was held in
Rio-De-Jenirio, 170 countries took part in this conference.
Conclusion:
It is true that global warming is occurring
and affecting the way we live. We can prevent the global temperature from searching
dangerous levels if we take steps of reducing emissions.
