At the start of this century, clean energy was all the rage. The revolution may still be happening, but it's taking its time, reports Peter Huck.

Police could have sealed the Pike River mine and saved any potential survivors...

Pike River coal boss Peter Whittall says his company has been vindicated by the Royal Commission into 29 miners deaths, but a spokesman for the families says it's obvious there was a lack of safety measures in place.

The gloves have come off for the first time in the Pike River commission of inquiry, with Solid Energy chief executive Don Elder taking "great offence" at suggestions he is trying to lower the mine's value prior to sale.

Blast shouldn't have happened in a modern mine, says Solid Energy chief.

Prime Minister John Key has defended New Zealand's emissions trading scheme amid criticism it is soft compared with a new Australian scheme.