The negative effects are the high concentration of CO2 (carbon dioxide) in the oceans because the more CO2 the ocean absorbs the less oxygen there is for marine life, as Peter Hannam says “Warming of the seas absorbs less oxygen at the surface. Another effect of climate change is that the oceans roll over less", said when there is not much oxygen in circulation that every living thing needs to live, and one of the main causes is that warm water does not exchange of place with cold water, because the oxygen to move into deep water where it is needed by unknown marine life