I saw a few interesting things on my trip yesterday. (see photo) Southwestern Ontario is still (somewhat) rich in oil reserves. Follow the Talbot Trail along the northern shore of Lake Erie and you'll see a fair number of these pumps forcing oil and natural gas to the surface. In fact, the site of pumps is also common farther in shore in such places as Petrolia and Oil Springs. (no links available at this time) I wish now I had taken a video of the pumps in action. Maybe next trip.
I guess the pumping will go on for as long as the electricity that runs the pumps
is cheaper than the price of the oil (or natural gas) that's pumped out.