1. Average atmospheric lifetime of 15 years.
2. Black carbon contributes to warming by being very effective at absorbing light and heating its surroundings. 
3. Black carbon is a component of Coarse particulate matter (PM10) air pollution. 

How many of the given above is/are correct?

1. It protects Earth from the Sun's ultraviolet radiation.
2. It is a major component of smog.
3. It is a powerful greenhouse gas and air pollutant that harms human health and ecosystems.

How many of the given above is/are correct?

1. Contains at least 1,500 species of vascular plants found nowhere else on Earth. 
2. Contains at least 100 species of endemic animals.
3. Has lost at least 50 percent of its primary native vegetation. 

How many of the given above is/are correct?

1. Hydrofluorocarbons (HFCs)
2. Nitrous oxide (N2O)
3. Methane (CH4)
4. Sulfur hexafluoride (SF6)
5. Nitrogen trifluoride (NF3)