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was
established.
Each
group
prepares
assessment
reports,
updated
approximately every 5-6 years.
Climate change is a change in the average weather conditions a given region
experiences on a decadal scale, a hundred and a thousand years. It includes
changes in temperature, precipitation, humidity, wind patterns, and other
environmental variables associated with alterations in atmospheric circulation
at local, regional, and global scales due to natural forces such as volcanic
activity and Earth-Sun astronomical shifts. However, the leading cause of the
current climate change is the increase in the concentration of greenhouse gases
(GHG) in the atmosphere due to an increase in the emissions of these gases from
human activities such as industrial fossil fuels and deforestation. These gases
trap part of the Earth's heat (or energy), allowing the environment and livable
conditions to continue for hundreds of thousands of years. An increase in the
GHG concentration means that more heat is retained by the atmosphere, leading
to an increase in the tropospheric temperature of the Earth. Climate change is
already causing significant impacts on people and ecosystems worldwide. It is
expected to have even more severe impacts, including increased flooding,