The trapped gasses that keeps the heat inside the Earth’s atmosphere is known as Greenhouse effect. The greenhouse effect raises the temperature slightly over decades. This is due to more heat goes inside the Earth’s atmosphere than goes out of it. This minor and stable "temperature increase" is known as Global Warming. Such trapped gasses are mostly Carbon Dioxide which comes mostly from combustion processes. Organic fuels such as coals and oil are abundant with carbons because it is a result of organic discomposure.
Global warming can result in major changes that can shake the balance of nature and maybe life. The more gasses trapped, the more it traps the heat for longer time. This affects the temperature globally. It can increase the temperature of the north and south poles. Such increase in the temperature can melt the ice which will result in less land for the species that depends on it in both poles.
