In which layer do light gases escape earth's gravity?

What was the first official pair of sister cities?

Which statement best explains distribution of natural resources? people tend to settle in locations that have the resources they need for survival. some countries have resources that others lack, so trade between countries becomes vital. fossil fuels come from areas that have mountains and other areas that manufacture synthetic gas. areas with natural resources provide a higher standard of living and better quality of life.

The formation of the planet uranus is estimated to have occurred approximately when?