Rising temperatures due to the increase of carbon dioxide and methane in the atmosphere will lead to:
ice at the South Pole and in glaciers will melt, causing global sea levels to rise - this will lead to increased, and/or permanent flooding in some areas
animals will move away from their 'natural' habitats to find cooler areas to live, and some plants/animals may become extinct if they cannot survive the warmer temperatures
weather patterns will begin to change with some areas becoming drier, and others much wetter - and even more extreme weather events like more frequent severe storms and heat waves/droughts
wildlife, and growth of crops, will be affected by the ever-changing weather systems
as more carbon dioxide is released, more will dissolve into water systems lowering the pH - more acidic waters can harm the organisms that live in them