You can download Kate Evans' latest cartoon, The Carbon Supermarket, from her website. It's a fantastic explanation of why carbon trading just doesn't work.
After seeing this I went looking through her archives, as well. I particularly liked this one about the Diggers, and this one about privacy rights, but they're all worth a read.
Update from my last post: that evening I went out to the AGM of the Friends of Galleywall Nature Reserve, a tiny nature reserve just down the road from me; and wound up volunteering as treasurer and to do a couple of other things to recruit volunteers. So if you're in S London & interested in local wildlife, let me know! There's an open morning coming up on the 12th December, as well.