Fill in the blanks:
______ is the main gas which causes global warming.
Global Warming:
What is global warming ? Name the gas whose increasing percentage in air is leading to global warming. State a harmful effect which can be caused by global warming.
Which of the following is the main cause of global warming ?
(a) nitrogen dioxide
(b) sulphur dioxide
(c) carbon dioxide
(d) ozone
Which of the following is the main cause of global warming?