Why do you think it was necessary to keep rebuilding the great wall?

Which of the following statements about wearher along mountain ranges is correct

Which measure of humidity, relative humidity or dew point, best describes the actual quantity of water vapor in a mass of air

Plz asap can someone find the answer or the mark scheme or anything plzzz you : ) ‘it's perfectly understandable that hundreds of millions of people around the world live close to volcanoes’ use evidence to support this statement. (6 marks)