It’s encouraging, but we shouldn’t rely on it to fix our problems. The good thing is that there are many thousands of varieties of diatoms, each with their own odds of adapting and overcoming the situation we’ve put them in. I have confidence that the planet will survive. But whether enough of these phytoplankton will evolve in time to keep catastrophic extinction events from occurring is still very much in question. We should do everything we can as a species to protect their health.