NZ lighting technology has saved the Countdown supermarket chain's owner almost $500,000 a year in energy costs in two of its buildings.

Investors who took up shares in newly listed Mighty River Power and Meridian will take little comfort from PwC's latest report on the electricity sector.

The Environmental Protection Agency is confident of defending their decision to allow off-shore oil drilling in the Taranaki basin, Prime Minister John Key said today.

The offshore protest against Anadarko's deep sea oil exploration will come to an end today as Greenpeace takes the battle to court.

Deep sea exploration oil drilling off the Waikato coast by Texas-based oil company Anadarko began early today.

Jack Johnson isn’t your typical rock star – he breaks the mould in terms of how the well-off behave.

Veteran New Zealand oilman Rob Jager says he can understand concern over deep water drilling off New Zealand's coast.

The Government, fresh from the sale of shares in Mighty River Power and Meridian Energy, faces a harder sell when it comes to divesting a 49 per cent stake in the third and final power generator.

The Auckland Council has approved oil exploration permits off the city's West Coast in a submission to the Government.

Two University of Auckland professors whose technology stands to change the world have won this year's Prime Minister's Science Prize.

The head of New Zealand's investment regulator has hit out at the Government's energy company sharemarket floats and says they have failed to lead the way in making it easier for retail investors to access information.

Meridian says a New York bank owns just 3.98 per cent of the company - not the 8.1 per cent it said earlier.

The price of newly-listed Meridian Energy instalment receipts edged higher this morning.

Analysts expect power company's stock to keep trading above its issue price after gaining 8% on first day.

Meridian Energy's shares debuted at $1.08 after tepid demand in the initial public offering saw the stock sold at the bottom end of its indicative range.

Share price expected to rise on first day but analysts are unsure of progress after that.

The chances of the Govt raising $5 billion to $7 billion from its partial assets sales is looking dimmer after details of No 2 sale, Meridian, were announced last night.

A Greenpeace-commissioned report shows dramatic blow-out effects of a deep-sea oil spill, but the industry says it's "science fiction".

Solid Energy has secured its restructuring deal with most of its banks and the Government following a series of meetings today in Christchurch.

Auckland bio-fuels pioneer Lanzatech has been named the second "hottest" bio-technology company in the world and 4th hottest for bio-chemicals.