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Why Climate Change will be the biggest Challenge of 21st Century?

What is Climate Change?

The simple concept of Climate change is the odd alter of weather due to human activities in an area. Another definition of Climate change is any significant long-term change in the expected patterns of average weather of a region over a significant period. Climate change is about abnormal variations to the climate, and the effects of these variations on other parts of the Earth.

Causes of Climate Change:

With the evolution of Life on Earth, Population has grown immensely. As the world population has increased, the dependence of man on different resources has also increased rapidly. Life on Earth is dependent on an atmospheric “greenhouse” – a layer of gasses, primarily water vapor, in the lower atmosphere that trap Ultraviolet radiations from the sun as it’s reflected back from the Earth, radiating it back and keeping our planet at a temperature capable of supporting life.

Human activity is currently generating an excess of long-lived greenhouse gasses that – unlike water vapor – don’t dissipate in response to temperature increases, resulting in a continuing buildup of heat.

Key greenhouse gasses include carbon dioxide, methane, and nitrous oxide. Carbon dioxide is the best-known, with natural sources including decomposition and animal respiration. The main source of excess carbon dioxide emissions is the burning of fossil fuels, while deforestation has reduced the amount of plant life available to turn CO2 into oxygen. 

Methane, a more potent but less abundant greenhouse gas, enters the atmosphere from spray of pesticides and use of fertilizers – both from animals such as cattle and arable farming methods and from fossil fuel exploration and abandoned oil and gas wells.

Chlorofluorocarbons and hydrofluorocarbons – once widely used in industrial applications and home appliances such as refrigerators – were key greenhouse gasses released during the 20th century, but are now heavily regulated due to their severe impact on the atmosphere, which includes ozone depletion, as well as trapping heat in the lower atmosphere.

 Effects of Climate Change:

The serious consequences of man-made climate change include:

1.Rising water level at sea.

2.higher ocean temperatures and destruction of the ecosystem.

3.An increase in extreme weather conditions like hail storms and Heavy rainfalls and shrinking glaciers

4.An increase in famine, drought and water crises, especially in developing countries.

5.increase in temperature limits i.e maximum and minimum. risks through rising heat strokes and heatwaves like in Karachi last year.

7.increasing spread of pests and pathogens and loss of biodiversity.

8.Ocean acidification due to increased HCO3 concentrations in the water as a consequence of increased CO₂ concentrations

the need for adaptation in all areas (e.g. agriculture, forestry, energy, infrastructure, tourism, etc.)

Measures to tackle Climate Change: 

  1. Prefer renewables like Electrical vehicles are being introduced. The global push for cleaner, healthier energy is on. 
  2. Use less non-renewable resources and fossil fuels.
  3. Plant more trees and avoid deforestation.
  4. Don’t waste energy and use it wisely.
  5. Consume less, waste less, enjoy life more. …
  6. Divest from fossil fuels as they are a major source of CO2.
  7. Government should take solid steps to reduce Air pollution.

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