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Climate news from ScienceDaily.com

• Even low levels of air pollution may quietly scar your heart, MRI study finds
  Breathing polluted air—even at levels considered “safe”—may quietly damage your heart. A new study using advanced MRI scans found that people exposed to more air pollution showed early signs of scarring in their heart muscle, which can lead to heart failure over time. This damage showed up in both healthy individuals and people with heart […]
• When rainforests died, the planet caught fire: New clues from Earth’s greatest extinction
  When Siberian volcanoes kicked off the Great Dying, the real climate villain turned out to be the rainforests themselves: once they collapsed, Earth’s biggest carbon sponge vanished, CO₂ rocketed, and a five-million-year heatwave followed. Fossils from China and clever climate models now link that botanical wipe-out to runaway warming, hinting that losing today’s tropical forests […]
• Antarctica’s ocean flip: Satellites catch sudden salt surge melting ice from below
  A massive and surprising change is unfolding around Antarctica. Scientists have discovered that the Southern Ocean is getting saltier, and sea ice is melting at record speed, enough to match the size of Greenland. This change has reversed a decades-long trend and is letting hidden heat rise to the surface, melting the ice from below. […]