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Hahahahaha. How was the wheat crop in Greenland this year?
There's never been a wheat crop in Greenland. At best, the settlers managed a bit of barley.
That's a good example of the denier alternate-reality history. In this case, they believe the Viking settlers grew vast fields of wheat in Greenland.
If someone wanted to, they could grow barley in Greenland now, but it makes no economic sense. We do know trees are coming back to Greenland now, something that didn't happened in the MWP. And it's now possible to grow cold-tolerant vegetables in Greenland, which is also new.
Produce picked from the tundra: Welcome to climate change in Greenland - World News
So, they were growing when it was warming.
That's odd. I thought Warming was bad? Is it easier to grow on a sheet of ice?