PHYS ORG SEA GRASS and PLASTIC
EXCERPT: There are some 70 species of marine seagrass, grouped in several families of flowering plants that - originally on land - recolonized the ocean some80 to 100 million years ago.
Growing from the Artic to the tropics, most speies hae long, grass-like leaves that can form vast unerwater meadows.
They are more than just pretty, however.
They play a vital role in improving water quality, absorb CO2 and exude oxygen, and are a natural nursery and refuge for hundreds of species of fish.
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