The enhanced greenhouse effect caused by increased greenhouse gases like carbon dioxide and methane in the atmosphere leads to abnormal warming of the Earth's surface and changes in long-term climate patterns globally, known as climate change. Rising temperatures as a result of greenhouse gases are causing impacts like melting ice caps, rising sea levels, more extreme weather, and severe flooding, affecting both ecosystems and human communities.

1. THE GREENHOUSE EFFECT
AND CLIMATE CHANGE
The enhanced
greenhouse
effect leads to
the abnormal
warming of
the Earth’s
surface. This
results to a
change in
climatic
patterns
around the
world, hence
the name,
climate
change.
Climate includes long-term
patterns of temperature,
precipitation, rainfall, humidity
and wind patterns. Much of the
changes have been attributed to
anthropogenic factors (burning of
fossil fuels and deforestation).
Rising levels of greenhouse gases
(CO2, methane, etc.) increased the
temperature of the Earth’s surface
causing massive impacts such as
melting of polar ice caps, rising sea
levels, erratic weather disturbances
and severe floodings in vulnerable
areas.
Changing climatic conditions
drastically affected the natural
ecosystems and the human
communities that relied on them.
http://www.ecy.wa.gov/climatechange/whatis.htm
http://www.climateandweather.net/global-warming/factors-that-influence-climate.html
http://www.epa.gov/climatechange/kids/scientists/clues.html