Giving up smoking is the easiest thing in the world. I know because I've done it thousands of times.
-Mark Twain, apparently
Below is a picture of some chimney on the Isle of Grain in Kent. It's clearly visible from the other side of the estuary, where I grew up. I used to think it looked like a giant cigarette; indeed, as dusk fell it spewed its poison into the air, granting spectacularly romantic chemical sunsets over Canvey Island and distant London.