Environmental Science
Columbia study highlights risks in sun-dimming geoengineering
Researchers at Columbia University have published a study warning that stratospheric aerosol injection, a proposed method to cool the planet by dimming the sun, faces significant physical, geopolitical, and economic hurdles not fully captured in climate models. The technique, which mimics volcanic eruptions by injecting sunlight-reflecting particles into the upper atmosphere, could lead to unpredictable outcomes like disrupted monsoons and material shortages. The team emphasizes that real-world implementation would be far messier than simulations suggest.
Sea levels rise faster than in 4,000 years around China's coasts
Scientists have found that global sea levels are climbing more quickly than at any time in the past 4,000 years, posing severe risks to China's major coastal cities. The rapid rise, driven by warming oceans and melting ice, combines with land subsidence from human activities like groundwater pumping. Cities such as Shanghai are implementing measures to stabilize the ground amid these threats.
Videos show marine life rebounding from trawling restrictions
Unique videos captured by scientists demonstrate how bans on bottom trawling in marine protected areas allow underwater ecosystems to recover rapidly. The footage highlights thriving fish populations and restored habitats just months after restrictions took effect. This evidence underscores the potential of targeted conservation measures to revive ocean biodiversity.
Scientists warn earth has hit first climate tipping point
International climate scientists have warned in a new report that tropical coral reefs have already crossed their tipping point due to rising ocean temperatures. The Global Tipping Points Report 2025 highlights risks of cascading failures in other climate systems if global warming exceeds 1.5°C. The findings come ahead of the 30th World Climate Conference in Brazil.