This is a good video which explains what hydraulic fracturing, or fracking is. And there are additional sources to look up to learn more about fracking at the bottom of his YouTube video.
And here is another excellent video:
This is a good video which explains what hydraulic fracturing, or fracking is. And there are additional sources to look up to learn more about fracking at the bottom of his YouTube video.
And here is another excellent video:
Schatzie's Earth Project 