¥CO2 levels are rising and will likely double
relative to pre-industrial levels by 2070.
¥The
greenhouse relationship between higher CO2 levels and warmer temperatures is
indisputable.
¥Even
with perfect knowledge of future CO2 levels, there is significant uncertainty about
how much warming would occur and how fast it would
occur.
¥Model
results indicate a 1.5 to 4.5oC global warming, with strongest warming in polar regions,
and an overall increase in global
precipitation.
¥Shifts
in precipitation are much more uncertain.