Phytoplankton are not only a food source, they absorb CO2, which means they are a carbon sink. Climate scientists study plankton, they will indicate increased acidity in the ocean resulting from temperature rise. These are made from waste plastic bottles, part of the marine litter problem in our oceans. Suspended kinetic installation. Exhibited at Fringe at the Factory, part of Norwich Fringe Festival, Norwich, Norfolk 2004. Moved to EcoTech (now Green Britain Centre) environmental education centre.