I read yesterday that sunflowers were used and to cleanup radioactivity at Chernobyl and the Atomic Bomb sites in Japan and may be used as part of a campaign to clean up the Fukushima area.
But my questions are:
- How does a sunflower absorb radioactivity?
- Is there a way to measure how well the sunflowers are working?
- Can sunflowers planted in not particularly radioactive places concentrate otherwise harmless radiation?
I was tempted to ask this on Skeptics.SE, but there's not much to be skeptical about, except whether or not it's a good idea