which of the following metals is known to pollute the air of big cities with a large number of vehicles?
which from the following can cause a tsunami?
The standard sea level in millibars is
The official working languages recognized by the UNO are __
which country won the first football world cup?
The secientist who first discovered that the earth revolves round the sun was
Which is the biggest literary award of Britain?
who was awarded the Golden Glove award for the best goalkeeper at the World Cup 2014?
The fraction of solar energy reflected from Earth into space is known as