evidence: Note that the figures above use a compilation of both instrumental and proxy data. [...] Arctic ice extent, snow cover and glacier volumes have decreased and sea level is rising. Surface ocean temperatures have increased. Warmer ocean temperatures will affect marine ecosystems and can place stress upon coral reefs. Furthermore, the increased CO2 in the atmosphere has also led to an increase of CO2 absorbed by the ocean. This has changed the chemistry of the surface ocean, a process known as ocean acidification, and it can lead to a whole host of other problems for marine life. [...] A national and international issue