The dam at Mt Keith is a leading global example of “mineral carbonation”, a chemical reaction triggered when the mine’s magnesium-rich wastes interact with air, leading to carbon dioxide being sucked out of the atmosphere and locked away in secure mineral crystals.

Here in Australia we pride ourselves on our world-class coffee. The only problem is that pang of guilt every time we throw one of those plastic-lined disposable cups into the bin – adding up to about a billion of them every year. So whenever a business comes up with an innovative way to reduce café waste, we’re all interested.

A variety of Australian startups are connecting customers and farms directly – removing the middleman and eliminating food waste in the process.

Drastically cutting methane emissions in the near-term might be our only hope of keeping heating below 1.5°C