Which type of mining causes large amounts of sediment and debris to choke rivers and streams as its main environmental impact?

The point where two air masses meet is called a

Why are all maps distorted? when reading a map, why is it important to check the legend? what is the difference between longitude and latitude? identify the meridian at 0° longitude and the parallel at 0° latitude.

How did geographic isolation affect the islands in the australasia ecozobne?