Misc: What type of bird is a 'Khaki Campbell'?

Questions

Which three-letter word can precede each of the following to make a new word each time -belt, -fare and -light.?

Which company markets the perfume 'L'Air du Temps'?

Which hot, dusty wind blows into Egypt, from the south in early spring and summer?

Which three-letter word can precede each of the following to make a new word each time?

Which warm wind from the south which is drawn into the valleys of the Northern Alps, helps to melt the snow in the spring?