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flag Algae turning snow red or green may speed up melting by absorbing more heat, affecting water supplies and climate.

flag Algae like Chlamydomonas nivalis can turn snow green, red, or orange, creating phenomena known as "watermelon snow," due to pigments that protect them from sunlight and cold. flag Scientists are studying how these microorganisms thrive in snowy environments and how their growth—potentially influenced by climate change—may accelerate snowmelt by reducing reflectivity. flag Research uses field data, satellites, and lab studies to assess their impact on water resources, ecosystems, and climate feedback loops, as darker snow absorbs more heat.

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