Wall Street moved lower with the price of oil amid concern about the global glut at a time of weakening worldwide economic growth.

The Court of Appeal has dismissed an appeal by New Zealand Carbon Farming against a decision in favour of Mighty River Power over a $34.7 million liability.

Fuel company Z says it has built New Zealand's first commercial-scale biodiesel plant, at Wiri, for $26 million.

Genesis Energy named AGL Energy executive Marc England as chief executive, replacing Albert Brantley who leaves after seven years

Mike Bennetts has driven Z Energy since its inception and this year has been a particularly strong one for shareholders.

Contact Energy's stock price slumped as the power firm failed to meet market forecasts amid tough competition and higher than expected costs related to bad debt and the separation from Origin Energy.

For Berliner Anke Seemann, Germany's energy transformation is the chance to exercise her green conscience.

A cartoon circulating on Twitter carries a warning for the oil industry.

Homeowners who suffered up to three days without power during a huge blackout will get just $50 each.

An employee who took customer details to start a competing gas supply business has been ordered to pay millions in damages.

Vector has launched the first rapid electric vehicle chargers in downtown Auckland.

A green overhaul by Auckland Council is expected to save ratepayers nearly three quarters of a million dollars each year.

Executive Mark Binns says a new wind farm is one of the options on the table if Meridian can't convince Genesis to keep open two electricity plants.

A mission to Ceres, a dwarf planet 257 million miles from the Sun and the size of Texas, may cost about $27 billion.

Vector has sold its New Zealand gas business to global utilities investment fund First State.

The way electricity lines companies charge for their services is all wrong and needs to change if we are to take advantage of emerging technologies, the Electricity Authority says.

Tauranga-based Trustpower will pay $5 a share in cash in a full takeover offer for King Country Energy, provided it gets at least 70.2 percent of the company.

Sixty-five staff to axed as operator admits there is no chance whatsover of finding a buyer for Waikato mine that's cost about $500,000 a month to keep open.

New Zealand Steel's blue collar workforce has agreed to forego annual bonus payments during unprofitable years.

The recent rally in Z shares convinced Infratil and the Super Fund that it was time to sell.

Infratil will book a profit of $392m on the sale of its remaining 20pc stake in Z Energy.

Contact Energy is facing growing pressure from institutional investors over its governance structure.

Battery frenemies Telsa, Panasonic poised for Solar power fight in Europe.

Z Energy is warning it's facing a potential multi-million dollar bill from NZ Customs - backdated to 1986.

Energy trust would be more loveable if its annual payout wasn't used to benefit individuals ... or to promote re-election of trustees, writes Brian Rudman.

Mighty River Power has become the latest electricity generator-retailer to announce a special dividend in the current earnings season.

Hundreds of thousands of Auckland households can expect an increased dividend payment of $345 in late September from the community trust that owns most of Vector.

Auckland households are set to get a bigger dividend payout from Vector next month.

Mighty River will spring another 2.5 cents per share special dividend for shareholders, having already given 5c in December.