Lucy Kirkwood, playwright of The Children (now playing on Broadway), says she was trying for a long time to figure out how to write plays about climate change. “Then the events of Fukushima happened, the terrible disaster there. There was a retired work force that volunteered to go back to clear up the plant there. And apparently the entire country sort of voluntarily monitored their own energy usage. They managed to bring down their national energy usage just because everyone was diligent and considerate and thought about themselves as part of something bigger.”