Для любого из вас, кто может понять это, наслаждаться бесплатными очками!

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.

Which barrier to economic development is shown in the following examples?

The pollution crisis in the soviet union was cause by