Q14 of 56 Page 79

‘Ozone-hole’ means

severe depletion of ozone in a region of the ozone layer and it is caused by the destruction of ozone by CFCs and by other compounds, such as carbon tetrachloride (CCl4) and carbon tetrafluoride (CF4).

More from this chapter

All 56 →
12

Which of the following is not a greenhouse gas?

 13

Which step is not involved in the carbon-cycle?

 15

Ozone-layer is getting depleted because of

 16

Which of the following is a recently originated problem of environment?