CSS bassist Ira is off, as she can't square the carbon-footprint of the band with her conscience:
“I am also a bit worried about climate change. People should care more and do something about it. I decided to fly less.
“CSS will always be in my heart. They said goodbye to their bass player, but they won a new life time fan. In health and sickness, in happiness and so forth. Blah blah blah, so help us God.”
Okay, it looks like the desire to do other things than tour with CSS - and, god knows, she must have bassed her way through Lets Make Love a thousand times a thousand times by now, at every festival on the planet - but the green angle makes for a more interesting story.