The first samples of water from mesocosms (experiment water enclosures) arrive in the labs on the shore of Kongsfjord. Samples are collected from inside the nine mesocosms and also from the fjord itself. The labels on the bottles beginning with the letter 'M' correspond to each of the nine numbered mesocosms, which will have different concentrations of CO2 'bubbled' through them. Greenpeace is working with scientists from the German marine research institute IFM-GEOMAR to investigate ocean acidification, by deploying nine large mesocosms in Kongsfjord, near the Arctic scientific research station of Ny-Alesund in Svalbard. The mesocosms are being used to investigate future implications of ocean acidification, a phenomenon caused by carbon dioxide (CO2) emissions that has just as much potential to damage marine ecosystems as climate change. Absorption of excess CO2 pollution by seawater causes its PH level to drop, making it more difficult for creatures integral to the food web to form shells and skeletons.