CLIMATE CHANGE - refers to the variation in the Earth's global climate or in regional climates over time. It describes changes in the variability or average state of the atmosphere over time scales ranging from decades to millions of years. These changes can be caused by processes internal to the Earth, external forces (e.g. variations in sunlight intensity) or, more recently, human activities.

"Some regions are likely to experience water shortages. Coupled with increasing demand, this is likely to result in large increases in the number of people at risk of water scarcity. It is likely to affect livelihoods, the report by the International Panel on Climate Change says.

Projected reductions in the area suitable for growing crops, and in the length of the growing season, are likely to produce an increased risk of hunger. In some countries, yields from rain-fed agriculture could be reduced by up to 50% by 2020.

Rising sea levels threaten large cities. Degradation of coral reefs and mangroves is likely, with impacts on local fisheries and tourism.

Rising temperatures, coupled with over-fishing, will decrease the supply of fish from large lakes, with important impacts on food supplies."




Recently I had the pleasure to assist in teaching a class dedicated to Science of Climate Change. The instructor, Dr. Wilson, was kind enough to let me take the material available to the students and posted it on my web site. So, here it is: NATS 1241.


"Nature loss 'dwarfs bank crisis'" - read on comparison of the current financial crisis and the real crisis due to the damage to the planet's ecosystem