Global Warming: Definition and Meaning, Causes of Global Warming

Get top class preparation for KVPY right from your home: fully solved questions with step-by-step explanation- practice your way to success.

Download PDF of This Page (Size: 185K)

Global Warming Definition and Meaning

  • This can be defined as a gradual increase in Earth’s mean surface temperature because of greenhouse gases.

  • The greenhouse effect is being caused by increased levels of carbon dioxide, CFCs, and other pollutants.

  • The global warming causes can have a negative effect on humans, plants, and animals.

Causes of Global Warming

Man-Made Causes

Man-made Causes of Global Warming

Man-Made Causes of Global Warming

Natural Causes

Natural Causes of Global Warming

Natural Causes of Global Warming

Effects of Global Warming

Effects of Global Warming

Effects of Global Warming

Gases That Contributing to the Greenhouse Effect

  • Carbon dioxide (CO2)

  • Methane (CH4)

  • Nitrous oxide (N2O)

  • Fluorinated gases

Natural Greenhouse Effect

  • The natural greenhouse effect is responsible for Life on the earth.

  • More than 95% of total greenhouse warming is produced due to the Natural Greenhouse Effect.

  • Due to natural greenhouse effect average global temperatures are maintained at about 15°C.

Global Warming Potential (GWP)

  • A relative measure of how much heat a greenhouse gas traps in the atmosphere.

  • The comparison is between a certain mass of the gas in question to the amount of heat trapped.

  • GWP calculation is done over a specific time interval (20,100 or 500 years generally).

Factors on Which GWP Depends

  • Absorption of infrared radiation.

  • Specific location w.r.t its absorbing wavelength.

  • Spectral location of its absorbing wavelength.

  • The atmospheric lifetime of the species.

Needs to be Done

  • GHG concentration in the atmosphere needs to be capped.

  • More focus is needed on energy conservation and energy efficiency.

  • Technological advancements for capturing gases in the atmosphere and storing them underground).

  • The global GHG emissions must be reduced by 50 80% of their current values as per IPCC (Intergovernmental Panel on Climate Change) which is the United Nations body for assessing the science related to climate change.

FAQs

Q. What is global warming?

Answer:

  • Global warming can be defined as a gradual increase in Earth’s mean surface temperature because of greenhouse gases.

  • The greenhouse effect is caused by increased levels of carbon dioxide, CFCs, and other pollutants.

Q. What are the two types of causes of Global Warming?

Answer:

The two types of causes of global warming are:

i) Man-made causes of global warming

ii) Natural causes of global warming

Q. List some of the effects of global warming.

Answer:

There are several effects of global warming:

i) Rise in Temperature

ii) Climate Change

iii) Disease Spread

iv) Decrease in the Human Population

v) Loss of the Natural Habitat

vi) Melting of icecaps and glaciers

Q. What can individuals do to reduce climate change?

Answer:

Individuals can take several steps to reduce climate change:

i) Home energy, landscaping, and consumption.

ii) Improving heating and cooling efficiency.

iii) Lowering water heater temperature.