Reading part4

The word 'pits' in P1 means

• sets in competition

• depresses

• removes the mark of

• hardens

The purpose of the first para of the passage is to

• present two opposing positions on the subject of earth's rising temperature

• argue for the reduction of green house gases in the atmosphere

• defend on economic grounds the reduction of greenhouse

• introduce two most spokemen for and against gases ecological reforms

The word 'that' in P2 refers to

• warming effect

• nitrous oxide

• chlorofluorocarbons

• methane

It can be inferred that all the following are greenhouse gases EXCEPT

• Nitrogen

• carbon dioxide

• methane

• nitrous oxide

From the information in the second para of the passage you can infer that a planet

• with a large amount of carbon dioxide in ...

• whose atmosphere was made up entirely of oxygen...

• whose atmosphere was made up entirely ...

• with little infrared radiation escaping...