Why is the oasis significant in north african life?

Can someone list any possible solutions to air pollution ?

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

The ratio of the measures of the three angles in a triangle is 14: 15: 11 find the measures of the angles