There are no industries in the surrounding 20km so it's very clean...

BBC: Brunello di Montalcino: How a Tuscan wine kept growing

It's so much easier to have a clean slate and start again.

BBC: Sheffield Jessop Hospital wing demolition approved

So, if it's cheap and clean energy we want, we should clear the way for fission energy start-ups.

WSJ: The New Nuclear Revolution

But the concept of incentivizing clean energy so that it's the cheaper, more effective kind of energy is one that is proven to work and is actually a market-based approach.

WHITEHOUSE: President Obama Holds a Town Hall in New Hampshire

Once you have done so, it's time to wipe that slate clean once and for all.

CNN: Feel the relief of a Facebook purge

Ms. MacKinnon serves the texts of the plays that she stages so faithfully that it's easy to underestimate the clean-lined certainty of her work.

WSJ: Who's Afraid of Virginia Woolf? | Still Shocking After All These Years | Theater Review by Terry Teachout

Over the last two decades an incredible two billion people have gained access to clean drinking water for the first time, so it's not such a pipe dream to argue that we should reach the remaining 783 million by this date.

CNN: World Water Day: An end to global thirst is in sight

So, it's understandable that local residents are keen to mobilise for a clean up, says Tony Cassidy, a psychologist at the University of Ulster.

BBC: England riots: Are brooms the symbol of the resistance?

Rather than doing too little too late, as it has so far, Spain's government should quickly admit the scale of the problem, clean up the banks, preferably by removing bad assets, and shut down, or recapitalise, what is left.

ECONOMIST: The euro crisis