Engineering

How green cities could remove CO₂ from the atmosphere

More than a thousand cities around the world now have "net zero" pledges: they want to emit only as much CO2 into the atmosphere as they can simultaneously recapture. An elaborate meta-study has now summarized the state of ...

Engineering

Permeable pavements to help mitigate flood disasters

This year has seen one of Australia's worst flood disasters on record in the eastern states, with 23 people killed, thousands left homeless, and a damage bill expected to top $1.5 billion.