Climate Change UPSC Questions

What is meant by climate change in contemporary usage?

The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere. Because it absorbs
UPSC - 2012

Which year was recorded as the hottest year globally?

Which gas is the largest overall contributor to the greenhouse effect?

The scientific view is that the increase in global temperature should not exceed 2ᵒC above pre-industrial level. If the global temperature increases beyond 3ᵒC above the pre-industrial level, what can be its possible impact/impacts on the world?
1. Terrestrial biosphere tends toward a net carbon source.
2. Widespread coral morality will occur.
3. All the global wetlands will permanently disappear.
4. Cultivation of cereals will not be possible anywhere in the world. Select the correct answer using the code given below.
UPSC - 2014

Consider the following statements regarding 'Earth Hour' :
1. It is an initiative of UNEP and UNESCO.
2. It is a movement in which the participants switch off the lights for one hour on a certain day every year.
3. It is a movement to raise awareness about climate change and the need to save the planet.
Which of the statements given above is/are correct?
UPSC - 2014