Which of the following is the main cause of global warming ?
(a) nitrogen dioxide
(b) sulphur dioxide
(c) carbon dioxide
(d) ozone
How does carbon dioxide cause global warming?
Which of the following is not a greenhouse gas?
(a) Carbon dioxide
(b) Sulphur dioxide
(c) Methane
(d) Nitrogen
Which of the following gas does not contribute to the formation of acid rain ?
(a) nitrogen monoxide
(b) carbon monoxide
(c) sulphur dioxide
(d) nitrogen dioxide