Essay On Global Warming | Global Warming effects - Dear India

Essay On Global Warming | Global Warming effects

Essay On Global Warming | Global Warming effects




The major threat of today’s world is global warming. Due to various reasons, global warming turns out to be a serious issue in the last few years. The age-old proverb everybody talks of weather and environment but nobody does anything about it, is not valid in this century. A worldwide study shows that the average temperature of earth has raised by as much as 0.2°C every decade. The rise in temperature is due to global warming which has now become an imminent threat.

First Understand " Green House Effect"
The greenhouse effect is a natural process that warms the Earth’s surface. When the Sun’s energy reaches the Earth’s atmosphere, some of it is reflected back to space and the rest is absorbed by greenhouse gases and re-radiated by greenhouse gases.
Greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons (CFCs).
The absorbed energy warms the atmosphere and the surface of the Earth. This process maintains the Earth’s temperature at around 33 degrees Celsius warmer than it would otherwise be, allowing life on Earth to exist.
The problem we now face is that human activities – particularly burning fossil fuels (coal, oil and natural gas), agriculture and land clearing – are increasing the concentrations of greenhouse gases. This is the enhanced greenhouse effect, which is contributing to the warming of the Earth.


Steps Of Green House Effect 

Step 1: Solar radiation reaches the Earth's atmosphere - some of this is reflected back into space.
Step 2: The rest of the sun's energy is absorbed by the land and the oceans, heating the Earth.
Step 3: Heat radiates from Earth towards space.
Step 4: Some of this heat is trapped by greenhouse gases in the atmosphere, keeping the Earth warm enough to sustain life.
Step 5: Human activities such as burning fossil fuels, agriculture, and land clearing are increasing the amount of greenhouse gases released into the atmosphere.
Step 6: This is trapping extra heat, and causing the Earth's temperature to rise.
What Is Global Warming

Global warming is the unusually rapid increase in Earth’s average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels. The global average surface temperature rose 0.6 to 0.9 degrees Celsius (1.1 to 1.6° F) between 1906 and 2005, and the rate of temperature increase has nearly doubled in the last 50 years. Temperatures are certain to go up further.

Effects Of Global Warming

     (1) Ocean Warming

The ocean is the largest solar energy collector on Earth. Not only does water cover more than 70 percent of our planet’s surface, it can also absorb large amounts of heat without a large increase in temperature. This tremendous ability to store and release heat over long periods of time gives the ocean a central role in stabilizing Earth’s climate system.

Increasing concentrations of greenhouse gases are preventing heat radiated from Earth’s surface from escaping into space as freely as it used to; most of the excess heat is being stored in the upper ocean. As a result, upper ocean heat content has increased significantly over the past two decades.

  (2) Ice Loss

Mountain glacierstore water which flows into rivers on which human populations depend for potable water, irrigation, food production, transport and generating energy, often in areas of dense population.  These glaciers are storing less water and melting more rapidly so that in the future sufficient water may not be available for an expanding human population and its increasing demand for food and potable water.

  (3) Sea Level Rise

We know that thermal expansion caused by ocean warming and loss of mass from ice sheets and glaciers are the primary causes of sea level rise.  Less certain is the speed with which these causes take effect. 

 Conclusions

For more than fifty years, climate scientists have warned that continued emission of greenhouse gasses into the atmosphere, particularly CO2, would result in climate change and if average global temperature rises by more than 1.5°C. above pre-industrial levels, those changes would be dangerous.  If the average global temperature rises by more than 2°C climate changes could become catastrophic, threatening most life on the planet.  If we continue to ignore these warnings, we do so at our peril. In practice, we have ignored them.

There is only one way of averting the outcomes described above and that is by stopping all use of fossil fuels over the next 10-20 years, improving the ability of natural carbon sinks and new technology to absorb COfrom the atmosphere.  Transition to a decarbonized economy can be achieved within this time frame and, in the process, renewable energy required by the human population could become unlimited in its availability, rather than a constraint on innovation.

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Essay On Global Warming | Global Warming effects Essay On Global Warming | Global Warming effects Reviewed by Pawan Prakassh on August 26, 2019 Rating: 5

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