March 19 2014
Climate Change cont.
Essay question: Last three weeks
With what we know about climate change, why are we not acting?
o Harm to future people
o Hard to understand
Always going to be a case of probabilities
o Opportunity costs/tradeoffs
o We will fix it before it gets that bad
Canadian government plans to reduce greenhouse gas emissions by 20%
below 2006 level by 2020 (3% below 1990 levels)
2009 report from the David Suzuki Foundation and Pembina institute showed
that Canada could meet Kytoto protocols and experience economic growth
(just 3.2% less than businessasusual)
Gardiner “Saved by Disaster?”
Giant climate change cause weather system destroys Toronto
Hong Kong in shambles after Climate Change Caused storm !
Australia abandoned after climate change caused drought!
Abrupt Climate Change
First IPCC report (1990) projected a rise in global temperature at an average
of 0.3C per decade, at an economic cost of 1.52% of gross world product.
However – recent research suggests that the climate system is not this regular.
There are certain thresholds if crossed with have catastrophic consequences
Main point is that it is not steady
North Atlantic meridional overturning circulation (MOC) may collapse in a
Result will be a loss of a lot of marine life systems and in land effects too
Buffer inbetween all