14 DAY TRIAL // This past April 9, the folks at Earth Unplugged released yet another video, and I for one find it quite entertaining, not to mention informative.
The video, available below, answers one very simple question that odds are many people have asked themselves over the years: why it is that our planet's seas and oceans are salty.
According to this Earth Unplugged video, our planet's oceans contain about 3.5% salt. This means that they are home to approximately 15 million billion tons of salt.
By the looks of it, some of this salt simply ended up in oceans after dissolving from rocks and sediments on the sea floor. Salt in global seas and oceans can also originate from volcanic vents, but, apparently, most of it comes from land.
Thus, it is said that rainwater dissolves minerals and salt from landscapes that it chances to fall on, and then carries it all the way to the ocean. It is estimated that rivers deposit about 4 billion tons of salt into global oceans on a yearly basis.
This means that, in time, seas and oceans might become saltier, the people at Earth Unplugged explain.
Check out the video below to learn more about how salt influences marine ecosystems, and feel free to share your thoughts on this latest Earth Unplugged production in the comments section.
