"Not knowing the law doesn't mean the law will treat you any differently if you break it." says David Allen Green, a lawyer from the UK. So, do you think we'd better spend a minute or two thinking about the words or emojis we use on social media before we press "send"?

A week earlier, at an industry-sponsored bioenergy conference, David Haberman, an engineer who has worked on an algae project, gave a talk warning of risks.

Photographer David Gilliver has produced a series of light painting photographs which showcase the silent world of abandoned WWII bunkers.