If Meridian Energy had already floated, it's a fair bet that its share price would have dropped after the Opposition unveiled its electricity policy a week ago.

Protesters have turned out in Northland to voice concerns at the potential health risks associated with mining in Puhipuhi.

It was "insane" for a New Zealand-born mine worker to smoke in an underground coal mine in Queensland, a New Zealand coal mining industry boss says.

Pike River Coal has been convicted of all charges arising from the November 2010 mining tragedy that killed 29 men.

Upset families of the 29 men killed at Pike River "cannot accept" findings of a report that absolves government employees of any blame for the 2010 tragedy.

A camera was lowered into the Pike River Mine on Friday, revealing more water than expected but not a great amount of damage.

John Palmer's last act as Solid Energy's chairman was to announce the bad news: the state-owned enterprise had posted a $40.2 million net loss for the 2011-12 financial year on the back of major asset writedowns.

Former Solid Energy chief executive Don Elder says the main reason for the company's near failure was "a stunning blow" in the form of "an unprecedented collapse in coal prices".

The Labour Party is calling for Solid Energy's former chief executive Don Elder to appear before the commerce select committee when its financial review is heard in March.

Officials are investigating a proposal which could lead to the Pike River mine being turned into an opencast coal pit stretching into a national park.

Genesis Energy has turned in a tidy-looking result for the six months to December 31, with net profit after tax up 85 per cent to $71 million.

Prime Minister John Key has denied that the Solid Energy crisis and Telecom job cuts are a black mark against the Government's handling of the economy.

Solid Energy is in crisis, with a Government bailout almost inevitable, mine closures possible and further job cuts likely in another restructure to try to salvage it.

Twice in the past decade, Solid Energy has enjoyed revenue close to $1 billion, and aside from last year has returned some healthy profits - and dividends for the Government.

Antarctica is "ground zero" for global warming, climate scientists say, and New Zealand will be the first to feel the effect of its melting ice.

The government's drive for new investment in oil and gas development in New Zealand has suffered another blow.