¿Cuántas personas viven en la Tierra? *
4.6 billion
O
1.1 trillion
7.3 billion
9.2 billion

Which biochemical cycle is relied upon for plant photosynthesis

In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements

Pollution from one country can affect another. for example, south korea is especially affected by pollution and dust storms that come from