They are all european mountain ranges
the world's current population is 7.3 billion and the world population in 1915 was 1.8 billion. The increase over the past century is 7.3 billion - 1.8 billion = 5.5 billion. So, the correct answer would be "more than 5 billion" (option D).
<span>The statement is true. Reclamation is the process of the restoration of mines, to their original and natural form. Reclamation is planned before mining, and is performed after mining has been done in an area.</span>
