Looking for clarity in the murk of a polluted lake. Made with funding from NZ On Air.

COMMENT: Govt is taking a more controlling approach to engagement with the treaty partner.

Mixed results in 10-year trend for region waterways.

Protesters say they are highlighting a "huge contradiction" in the Government's policy.

Influential tribe is demanding direct engagement and hints at court action.

Government moves to supply safe water, provide blood tests for residents.

Third round of tests goes wider, continues to find contamination.

Health professionals have been urged to back Govt's proposed Zero Carbon Act.

Outgoing PM's science adviser Sir Peter Gluckman reflects on his decade in the top role.

It we don't act now, more plastic will be in the oceans than fish.

50 years on from the Manapouri saga, NZ's laws have failed its environment, writer argues.

China's new ban on many recyclables has caused bigger headaches than expected for NZ.

Iwi trust at the centre of accountability concerns invites ministers to see achievements.

Competing with more efficient private operators to do it is folly.

COMMENT: Pāmu, NZ's biggest farming company, has seen future and it is sustainable.

Opposition attacks ruling, saying applications the only lifeline for charter schools.

The work of farmers fencing streams is paying water quality dividends but more to do.

A spokesman for Ōhakea residents says human health, land values are the two main issues.

Better testing and information needed on chemical contamination near Ohakea, lawyer says.

How much finance is the world putting toward curbing climate change? Not enough.

Stockpiles mounting around NZ as recycling companies deal with China's foreign waste ban.

Lifting "swimmability" of our lakes and rivers to 78 per cent may cost $217m a year.

Affected residents form committee, recovery manager appointed.

Party needs to be centrist so it can ally with any others, Che Wilson says.

An East Coast waka voyage has encountered a surprising amount of ocean plastic pollution.

Plastic has many uses - but have we made too much and what can we do about it?

Study finds multiple factors contributing to faster-than-expected small improvement

Macy Duxfield got scholarships, did university papers in Year 13

The war over water hit boiling point amid 2017's election. Will 2018 see tensions simmer?

Ten beach sites in Auckland among those listed as unsafe.