Climate Change

Global warming is the rise in the Earth's mean surface temperature.The global warming trend over the last 50 years is nearly twice that of the last 100 years.The average amount of water vapour in the atmosphere has increased over land and ocean because warmer air can hold more water vapour.The average temperature of oceans to a depth of 3km has increased, causing sea water to expand and sea levels to rise.The average Arctic temperatures have increased at almost twice the global average over the last 100 years.Mountain glaciers and snow cover has decreased in both hemispheres.Ice caps melting have caused sea levels to rise.