Global Warming

as we go deeper in the studies in bsc chronicle   we can find what global warming is it this is the average temperature of the earth is about 15degree celcius.  The earth temperature however fluctuates slowly over time the global temperature trend has been generally upward in the last 18,000 years since the last ice age bsc chronicle  but the rate of increase has recently accelerated this rapid warming may be the result of an enhanced green house effect the trapping of heat by the atmosphere glass in a green house is transparent to light but not to heat.  The temperature inside a greenhouse rises because the hear is unable to escape.  On earth green house gases carbon dioxide methane CFCs and others take the place of glass hear that would otherwise  radiate away from the planet is absorbed and trapped by these causing a rise in the surface temperature this can be seen in bscchronicle