I couldn't tell you with any certainty as I'm not a scientist

You don't need to be a scientist. You just need to have some, any, experience with growing plants. Maybe that's hard if you live in a big city in an apartment, but surely you know somebody who is a gardener, or grows hydroponics, or you've even seen a movie about farmers struggling with droughts and floods?

Getting a small patch of the desert to bloom is not hard. Normally all you need is water. That's what happens at an oasis. What's implausible is that it is CO2 emissions from a factory that is responsible.