Hydrogen unlikely to be a cost-competitive option for heavy industry to reduce emissions.

Where did all of this heat come from? Jamie Morton explains.

A NZ researcher says obesity, climate change and undernutrition can be tackled at once.

Answers needed as climate change, storm events threaten to wash away remains.

More CO2 might be getting sucked out of Auckland's atmosphere than first thought.

29 countries hit new highs during year that is the fourth hottest on record.

Last summer's record warmth - on land and sea - a taste of what might come this century.

Scientists finger climate change in trends showing warming NZ seas over past 30 years.

Jacinda Ardern was part of a climate change panel at the World Economic Forum in Davos

COMMENT: Fossil fuels stripped of carbon leave clean hydrogen for use.

Trump might have been joking, but but scientists see nothing to laugh at.

The massive East Antarctica ice sheet is already a major contributor to sea-level rise.

One of the worst towns for air pollution the focus of a study pin-pointing NZ's problems.

Warm seas look set to keep overnight temperatures above normal for a while.

Experts say the United State's biggest crisis has nothing to do with the border.

From time travel to dreams, scientists answer - or try to - 10 of the biggest questions.

Just how cold does it get at Antarctica's Scott Base? Jamie Morton explains.

'As the ocean continues to warm the ecological changes could be catastrophic.'

Kiwi scientists have found a clever way to look at how climate change will hit Antarctica.

Researchers are examining how much heat waves may have contributed to the jellyfish bloom.

OPINION: Imagining a world of change as daughter Greta grows up.

EDITORIAL: Few modern leaders have had such a tough year.

A once-vibrant waterfront now littered with bach corpses, eerie reminders of summers past.

NZ just saw its warmest year in one and a half centuries of records, scientist says.

It seems they are now realising that the expense of doing nothing is rising rapidly.

While NZ is getting drenched, Australia is bracing for heatwaves not seen since the 1930s.

A year ago Kaiaua was devastated by a monster storm.

If you're prone to migraines, you might want to reconsider that Chrissy tipple.

The creature's behaviour is said to compare to Trump's stance on global warming.

Could bees be the key to better biosecurity? Scientists think so.