A growing portion of China's toilet waste is converted into fertiliser and biogas.

Meridian Energy is replacing two of its transformers at its Manapouri power station after finding a fault with cooling units.

Mighty River Power and Meridian Energy will keep the price they charge for electricity on hold this year for the third year in a row.

Oil bulls finally caught a break as prices capped their first weekly advance since November.

Oil advanced after the International Energy Agency lowered forecasts for supplies from outside Opec and an industry report showed US companies had reduced drilling activity.

Hydro lake levels are falling and wholesale power prices rising as drought threatens in parts of the country.

Kiwis should have more disposable cash as petrol prices fall around the country, but consumer groups say the amount we fork out at the pumps should be lower still.

Mighty River Power and the Tuwharetoa Maori Trust Board have signed a deal over water in Lake Taupo, the terms of which the electricity generator says are confidential.

Kim Campbell has organised a meeting this afternoon to discuss strategies to soften up Aucklanders for the sale of the remaining shares in lines company Vector to pay for new roads.

Nobel Laureate and former United States Energy Secretary Steven Chu says New Zealand has an opportunity to quickly ramp up its use of renewable energy because of the huge strides being made in wind,....

Winston Peters writes: There is a group of people who want to get rid of the Auckland Energy Consumer Trust. But why fix what isn't broken?

Pulse Energy reported a net loss of $9.99 million, or 2.9 cents per share, in the six months ended September 30.

Geothermal has pipped gas generation for the first time as more plants come on stream.

Biofuel developer LanzaTech's coffers have been bolstered with a US$60 million ($78.5 million) cash injection from the New Zealand Superannuation Fund.

Genesis has raised US$150 million in its first issue of notes in the US private placement market and will use the funds to repay bank debt.

The big kids are having a party, and this year it's at Australia's place. New Zealand, as the host's little sibling, gets to come along, too. We're under strict instructions not to touch the buffet and to stay well away from the fruit punch.

Land bought by Meridian for its controversial $2b wind farm is on the market spelling the final chapter of the failed project.

Mr and Mrs Popularity will meet again today in Auckland when German Chancellor Angela Merkel jets into town to meet Prime Minister John Key.

If I were running Mercury, I'd regard people like myself as perfect customers, writes Brian Rudman.

New Zealand-founded LanzaTech has been named the world’s hottest bioenergy company in a prestigious annual list.

Infratil will return $120m to shareholders as a special dividend after it sold its Australian energy assets for a net $670m.

Call me a Luddite, but I don't want a "smart" electricity meter installed at home, and certainly not without my knowledge or consent.

Google, Yahoo and Microsoft are part of a growing number of firms that are entering into power purchase agreements with wind farms.

Mighty River Power has announced a possible $50 million share buy-back in the coming year.

Mighty River Power told shareholders its 2015 earnings will be at the lower end of guidance at the Auckland-based company's annual meeting today.

Mighty River Power, the first of the state-owned power companies to be partially privatised last year, will pay a special dividend to shareholders after the latest board review of its capital....