Next to a geothermal plant in Iceland a start-up is growing microalgae for food.
People are being warned to keep out of the water after a suspected outbreak of algae.
Emily Broadwell will spend seven weeks in an ex-whaling station studying algae growth.
Seaweed and microalgae is increasingly being turned into useful products.
In a site near Reykjavik, geothermal energy is being used to create products rich in protein.
An Australian craft brewery is using microalgae to turn their carbon emissions into oxygen.
Seas around the west coast of Scotland have been taking on a vivid turquoise hue.
The vivid turquoise colour of the sea off the west coast looks like holiday snaps from the Mediterranean.
A "disgusting" and "unpleasant" smell is coming from a "crust of algae" on a town centre lake.
