Scientists say duckweed removes nitrogen, phosphates from water
https://www.fondriest.com/news/scientists-say-duckweed-removes-nitrogen-phosphates-water.htm
https://www.fondriest.com/news/scientists-say-duckweed-removes-nitrogen-phosphates-water.htm
Hawaii’s sacred Lake Waiau — the state’s only alpine lake — is shrinking. Scientists are building a record of its changes from old photos.
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