"Phytoremediation is the use of plants to remove contaminants from the environment and to render them harmless, as simple as that, " he says.

CNN: Flower power

That, I think, is going to be the limitation of ever trying to design a game that uses the real-world environment around you to render events.

FORBES: Connect

Opening up sport in the way I'm advocating would render it a safer, more secure environment.

CNN: Opinion: It's time to allow doping in sport