I wasn't expecting it to be so much fun.
I mean, this is serious. If we can't persuade governments to act decisively to reduce carbon emissions, global warming is going to fry us to a crisp.
That's why I joined the Time to Act on Climate Change march on the 7th of March. 'I'm marching because our precious beautiful planet is all we've got - and it would be such a tragic waste if we trashed it,' I glumly declared on the train up to town.
But already, catching up with my Transition Town pals, the animated chat, the sense of common purpose were starting to cheer me up. One of them had told her mum she was going on the climate change march. "That's nice, dear. Are you for or against it?" her mother had replied. I was starting to feel slightly hilarious.