Scientists estimate sea kelp generates $500 bn a year

Undersea kelp forests generate some $500 billion in fishing revenue and other benefits while absorbing five million metric tons of carbon dioxide a year, scientists estimated in a study published Tuesday.

Climate change is making lakes less blue

If global warming persists, blue lakes worldwide are at risk of turning green-brown, according to a new study which presents the first global inventory of lake color. Shifts in lake water color can indicate a loss of ecosystem ...

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