The ecological health of New Zealand's lowland rivers and lakes is in decline, but principles borrowed from drinking water safety could help reverse the degradation.

Discusses the need for “renewable energy breeding” – the process by which mining the raw materials and manufacturing technologies such as solar cells and wind turbines are themselves powered by renewables rather than fossil fuels.

The Electoral Funding and Disclosure Reform bill seeks to ban foreign donations to political parties and their “associated entities”. But it also seeks to capture organisations, including charities, that undertake public advocacy on policy issues.

The author of the controversial Silent Invasion argues it's not the book, but the reaction to it, that has highlighted something troubling in Australian intellectual life.

Scientific problems require evidence-led solutions. A new proposal to create a federal environmental decision-making body would take some of the politics out of climate policy.