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Welcome!
Your search for information about "Is global
warming really happening?" is
successful!
All the details and
information about global warming
happening.
 Sadly,
yes it is already happening. The IPCC concluded in
its previous Third Assessment Report that an
increasing body of observations gives a collective
picture of a warming world and other changes in the
climate system. The kinds of changes observed that
creates this consistent picture
include:
Climatic
changes
* Increase in global
average surface temperature of about 1°F in
the 20th century
* Decrease of snow
cover and sea ice extent and the retreat of
mountain glaciers in the latter half of the 20th
century
* Rise in global
average sea level and the increase in ocean water
temperatures
* Likely increase in
average precipitation over the middle and high
latitudes of the Northern Hemisphere, and over
tropical land areas
* Increase in the
frequency of extreme precipitation events in some
regions of the world
Physical and ecological
changes
* Thawing of
permafrost
* Lengthening of the
growing season in middle and high
latitudes
* Poleward and upward
shift of plant and animal ranges
* Decline of some
plant and animal species
* Earlier flowering of
trees
* Earlier emergence of
insects
* Earlier egg-laying
in birds
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