evidence: - Increasing greenhouse gas emissions from human activity act like a blanket wrapped around the earth, trapping the sun’s heat and raising temperatures. [...] - Every increase in global warming matters. In a 2018 report, thousands of scientists and government reviewers agreed that limiting global temperature rise to no more than 1.5°C would help us avoid the worst climate impacts and maintain a livable climate. Yet the current path of carbon dioxide emissions could increase global temperature by as much as 4.4°C by the end of the century. [...] - Due to climate change, the ocean is warmer, more acidic and less productive today. The ocean has absorbed between 20 to 30 per cent of human-induced carbon dioxide emissions since the 1980s, exacerbating acidification. (IPCC)