Which of the following elements present in a fossil fuel causes pollution on burning?
Hydrogen
Carbon
Sulphur
Oxygen
Many cars today are designed to get better gas mileage than those made in the past. This change resulted from a need to
Recycle materials
Improve safety
Produce chemicals
Conserve resources
Which of the following gases is not a green house gas?
Sulphur dioxide
Carbon dioxide
Methane
Which one of the following is not used for disinfection of drinking water?
Chloromine
Chlorine
Ozone
Phenyl
The table below groups some sources of pollution.
Which group causes air pollution?
I
II
III
IV
The table shows the number of vehicles passing by on an 'X' road at different times of the day.It is most likely that the air was most polluted during the time
