Global Warming Causes: Atmospheric Composition
The current trend of global warming is primarily driven by changes in the composition of Earth's atmosphere.
Atmospheric Composition Changes
The increase in greenhouse gases (like carbon dioxide, methane, and nitrous oxide) traps more heat in the atmosphere. This phenomenon, known as the greenhouse effect, leads to a rise in global temperatures. Human activities, such as burning fossil fuels and deforestation, are the main contributors to this increase in greenhouse gases.
Analysis of Other Options
- Orbital and solar variability and sunspot cycles influence Earth's climate over long timescales but do not explain the rapid warming observed in recent decades.
- Earth movements (like tectonic shifts or variations in Earth's orbit) cause climate changes over geological time but are not the cause of the present warming trend.
Therefore, the most accurate explanation for the present trend of global warming is the alteration of atmospheric composition.
Important Questions from Climate Change
"Climate Action Tracker", which monitors the emission reduction pledges of different countries is a:
Consider the following statements :
- "The Climate Group" is an international non- profit organization that drives climate action by building large networks and runs
- The International Energy Agency in partnership with the Climate Group launched a global initiative "EP100".
- EP100 brings together leading companies committed to driving innovation in energy efficiency and increasing competitiveness while delivering on emission reduction goals.
- Some Indian companies are members of EP100.
- The International Energy Agency is the Secretariat to the "Under2 Coalition".
Which of the statements given above are correct?
-
(a) 1, 2, 4 and 5
1, 3 and 4 only
- 2, 3 and 5 only (d) 1, 2, 3, 4 and 5
Which of the following is not a greenhouse gas?
- Choose the indicators of global warming from the following:
A. Warming of ocean water
B. Earthquake
C. Melting of ice cover
D. Rise in sea level
E. Nuclear plant outbreak
Choose the correct answer from the options given below : - Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Climate change events such as droughts tend to significantly impact pregnant women's health.
Reason (R): During periods of drought, inadequate access to water, contaminated water sources, leads to a recurrence of fever, and gastroenterological illness among pregnant women.
In the light of the above statements, choose the most appropriate answer from the options given below:
