The global production of food is responsible for a third of all planet-heating gases emitted by human activity, with the use of animals for meat causing twice the pollution of producing plant-based foods, a major new study has found.
Complex systems, such as the atmosphere, oceans, and biosphere seek equilibrium. When they are pushed too far out of one equilibrium state, they can flip suddenly into another. Once a transition has happened, it cannot realistically be reversed.
Hydropower has long been seen as a reliable renewable energy source. But during drought and heavy rain, hydropower plants often come to a standstill. Will climate change spell the end for this clean energy alternative?
Cambridge astronomers have identified a new class of habitable exoplanets, called Hycean planets – hot, ocean-covered, and with hydrogen-rich atmospheres – which are more numerous and observable than Earth-like planets.
Human activity is changing the climate in unprecedented and sometimes irreversible ways, says a major UN scientific report. It warns of increasingly extreme heatwaves, droughts, and flooding, and a key temperature limit being broken in just over a decade.