Carbon credits must be scrutinised – and none more so than credits for taking grazing animals off arid rangelands.
When groundwater comes to the surface, sunlight and air convert organic molecules to greenhouse gases. That’s going to be a problem as we will need this water more as the world warms.
A global collaboration, led by researchers from UNSW, has shown how liquid gallium can be used to help achieve the important goal of net zero carbon emissions.
Quantum computers, making greenhouse gases useful, COVID-19 infection from droplet spread and water security were some of the most popular engineering stories in 2020.
If atmospheric carbon dioxide levels double from their pre-industrial levels and are maintained, the world would probably experience eventual warming from 2.3 – 4.5°C, rather than the previously estimated 1.5 – 4.5°C range.
As the world warmed from the last ice age, a rise in carbon dioxide levels stalled for nearly 2,000 years. That's always puzzled scientists, but now they think they know what happened.
Making catalysts to convert waste carbon dioxide into useful industrial products has been expensive and complicated – until now. UNSW engineers show it’s as easy as playing with Lego.
Global temperatures for February showed a disturbing and unprecedented upward spike, write Steve Sherwood and Stefan Rahmstorf.
Carbon dioxide concentrations in seawater could reach levels high enough to make fish “intoxicated” many decades earlier than previously thought, with serious implications for the world’s fisheries.
Rivers in many agriculturally significant areas of Australia could lose water as the landscape grows greener, write Anna Ukkola and Albert Van Dijk.