What two countries have land borders with the united states?

What factors led to europe's global dominance in economic and political factors? what impacts did that dominance have on other peoples and environments?

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

What two advantages do the coastal countries of west africa have over the sahel countriesfertile soil and mineral resources temperatures and terrain human resources and natural resources weather patterns and location