Gasoline, smoke from factories, oil
<span>Answer:
A process known as thermohaline circulation, or the ocean conveyor belt, drives these deep underwater currents. When the conveyor belt reaches the southern part of the globe, it is driven back to the northern oceans by the Antarctic Circumpolar Current.</span>
It is an article in a professional journal. Major newspapers or other media could be biased and a public hearing doesn't guarantee that the people talking are credible.
Water following over a steeper slope. It picks up sediment and carries most of it to bodies of water. Mountain streams erode narrow, v shaped valleys and waterfalls. Erosion and deposition by slow-flowing rivers creates broad flood plains and meanders.