Mercury Energy is offering customers the chance to take a punt and lock in power prices for the next three years.

There's about 1 trillion tonnes of easy-access coal available.

Plans to build New Zealand's biggest geothermal power station are a step closer to reality, with Contact winning draft approval for its 250 megawatt Tauhara station.

An eco-friendly NZ holiday house has been named in the world's top 15 for its unique design.