Which of the following statements about Black Carbon is are correct 1 Black Carbon ha...........

Environment and Ecology Envirnment and Climate Change

Which of the following statements about Black Carbon is/are correct?

1. Black Carbon has a global warming potential even higher than Green House Gases like Methane, Carbon Dioxide etc.

2. Black Carbon from Airplane is generally considered safe as it cannot go above 4 km height and eventually precipitates down through winds and rains.

Choose the correct alternative:

1 only

2 only

Both 1 and 2

Neither 1 nor 2

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Explanation:

A recent study conducted by ISRO’s Vikram Sarabhai Centre and IISc Bangalore has concluded that Black Carbon released by aeroplanes is potential in depleting ozone layer, affect monsoon and quicken glacier melt. The study broke away that myth that black carbon from airplanes cannot go beyond 4km height and will eventually settle down due to winds and rain. However, the study concluded that the black carbon from airplanes have been found to reach height as high as 18 kilometers, a stable part of atmosphere. The 2nd statement is correct because the word ‘general’ implies that the above discovery is only study that talks about Black Carbon going to reaches of 18 kilometres. Hence, answer is c.