Coking coal prices rose last month as India, Europe and Japan joined China's recovery.
Solar, new technology can help smooth shift from residential gas use, energy distributor Vector says.
Cooking with gas will start becoming a thing of the past from mid-decade if the Climate Change Commission's advice on how to 'pick up the pace' to meet climate change targets is accepted.
Energy strategy must include long-term plan for hard-to-decarbonise industries like steel making, cement and lime.