a change in the state of the climate that can be identified (ex. using statistical tests) by changes int eh mean and/or the variability of its properties, and that permits for an extended period, typically decades or longer
it refers to any change in climate over time, whether due to natural variability or as a result of human activity
Al Gore Video
What are the causes of climate change?
management of forest
melting of the permafrost
still rely on DIRTY, CARBON-based FUEl for all 85% of energy burned in the world
What is the evidence of climate change?
the massive buildup of all man-made global warming pollution is trapping as much extra heat energy every day as would be released by 400,000 Hiroshima-class atomic bombs exploding every 24 hours
this disrupts the hydrological cycle
evaporating much more water vapour from the oceans