“Climate change is…a gross injustice—poor people in developing countries bear over 90% of the burden—through death, disease, destitution and financial loss—yet are least responsible for creating the problem.”
- Barbara Stocking, CEO of Oxfam GB
The earth is constantly exposed to radiations from the sun and other
planetary objects. Some of the sun radiations are reflected by the surface of
the earth. The remaining radiation is absorbed by certain gases in the earth’s
surface. These gases trap the heat of the radiations. Due to the trapping of
this heat the earth warms up. This is known as Green House Effect.
The gases which trap the heat are known as greenhouse gases. A few
examples of greenhouse gases are ozone, carbon dioxide, nitrous oxide, methane,
and water vapour. The term greenhouse effect comes from the concept of a garden
inside a glass room. The glass absorbs all the heat. The glass does not allow
heat to escape from the garden and eventually heats up the garden. So, the term
greenhouse effect became applicable not only to gardens but also to the earth..
A similar example is how heat enters a car through the glass windows. If the
car windows are closed the heat cannot escape and the car warms up.
The greenhouse effect is essential to maintain adequate warmth of the
globe as well. If the greenhouse gases volume increases too much then it leads
to an increase in global warming. There are lot of human activities that
generate gases that trap sunlight. Some common activities are:
trees and burning them
of oil, coal, and natural gas – fossil fuels
of organic waste
output and agricultural processes
Of all the most common gases, carbon-dioxide, due to its large
quantities, causes most of global warming. If human beings control the
activities that lead to greenhouse gas generation, then global warming will
also be controlled. While preparing for the Professional Engineer Exam
, the engineer will be able to understand global warming challenges.
Consequences of Global Warming
Impact on Weather: Some regions of the earth will become warmer, while
other regions become colder. The weather changes will have an impact on the
types of crops that can be grown in certain regions. Animals, plants, and human
beings will be affected by these significant weather changes.
Impact on Sea Level: As ice melts due to global warming, the sea level
also increases. This increase in sea level by 20-40 cm will lead to floods that
can destroy livelihood and farmlands.
Impact on Farming: Every crop needs a optimal temperature to provide a
good yield. But due to global warming the temperature fluctuates and so crops
will not have the desired temperature and yield less. Less crop yield may lead
to hunger in certain parts of the globe.