Thank you.
I thank Mr. Calkins for his line of questioning, because I'd like to follow up on that a little bit with Dr. Rivera.
Certain aquifers in North America were filled by the end of the last glacial era. That was the big recharge that created things. When we talk about drawing from aquifers, either for wells or for industrial usage, this is something new to the past 100 or 150 years to any significant amount. Before that, the past 10,000 years, there has been sort of a system built up.
Do we know, independently of recharge rates, there are consequences other than simply removing water? When we remove water from underground aquifers, we have new flows created. We have shifting patterns of behaviour down there that have never happened before. It's more than just, we have a pot, it's now empty, and it will be empty for a little while until it fills up again. There are actually new behaviours happening.
How much of the science is establishing what happened before? How much of the science is happening now? Is there a capacity to try to understand that difference?