How the climate change ?
If nothing is done to reduce emissions, current climate models predict a global warming of about 1.4 – 5.8°C between 1990 and 2100. These projections are based on a wide range of assumptions about the main forces driving future emissions (such as population growth and technological change) but do not assume any climate change policies for reducing emissions. Even a 1.4oC rise would be larger than any century-time-scale trend for the past 10,000 years. These projections takes into account the effects of aerosols and the delaying effect of the oceans. Oceanic inertia means that the earth’s surface and lower atmosphere would continue to warm for hundreds of years even if greenhouse gas concentrations stopped rising in 2100. The average sea level is predicted to rise by 9 to 88 cm by 2100. This would be caused mainly by the thermal expansion of the upper layers of the ocean as they warm, with some contribution from melting glaciers. The uncertainty range is large, and changing ocean curren
