There are approximately how many people in the world today? A. 1.5 billion B. 7.8 billion C. 3 billion D. 10 billion

On the map below, which of the following rivers is identified by blue? the huang he river the yangtze river the han river the naktong river

How can minerals crystallize from materials dissolved in water? check all that apply.

In russia which of these challenges affects the transportation of both petroleum products and other goods?