What are some bad things that happen during Global Warming?

It's not so much the global warming itself that results in
negative consequences for life on Earth, but rather the Climate Change that comes about
because of it.  We don't fully understand the complete impact over time, and it will
vary based on how much the temperature warms in the next 50 years, but some of what is
predicted is a change in precipitation patterns - extended drought or extended
rain/snowfall in places where that is unusual.  Stronger hurricanes and cyclones as they
feed on the warm water. 

The biggest potential effect will
be with animal, plant and insect species, as the climate may change too quickly for many
of them to adapt, thus leading to their extinction.  Since we don't fully understand the
food chains, some of these animals will disrupt our food supply as well.  The honeybee
is a good example of a species that is already struggling, and we rely on it to
pollinate many of our food crops.

Some rather obvious
evidence of global warming taking place is the rapid disappearance and shrinking of
glaciers around the globe.