The report said that, if temperatures rise by four degrees, regions will feel different effects -- recent heatwaves in Russia could become an annual norm and July in the Mediterranean could be nine degrees higher than the area's warmest level now.
Under that scenario, the acidity of the oceans could rise at a rate unprecedented in world history, threatening coral reefs that protect shorelines and provide a habitat for fish species.
Rising sea levels could inundate coastal areas with the most vulnerable cities found in Bangladesh, India, Indonesia, Madagascar, Mexico, Mozambique, the Philippines, Venezuela and Vietnam, the study said.
"Many small islands may not be able to sustain the communities at all. There would be irreversible loss of biodiversity," Kim said.
The study found that the most alarming impact may be on food production, with the world already expected to struggle to meet demand for a growing and increasingly wealthy population that is eating more meat.
Low-lying areas such as Bangladesh, Egypt, Vietnam and parts of Africa's coast could see major blows to food production, with drought severely hindering agriculture elsewhere, the study said.