gcsescience.com 77 gcsescience.com
Environmental Issues.
2) Fossil fuels are burnt on a huge scale - Global Warming.
Carbon dioxide is called a greenhouse gas.
It is causing the global temperature of the Earth to rise.
This rise in temperature affects the climate all over the planet
in ways which are hard to predict.
Some areas may become wetter or dryer,
other areas may become hotter.
The main (predictable) directions of wind
and ocean currents on the planet
may slow down, speed up, or change
direction.
This could have catastrophic
consequences for life on planet Earth.
Is Global Warming really
happening? - What's the
evidence?
Evidence is everywhere.
Nineteen out of the twenty hottest
years on record have occurred since 1983.
2005 and 1998 have been the hottest years so far
recorded,
followed by 2006, 2002, 2003 and
2004.
Glaciers (ice
up mountains) and polar ice caps
(the North and South
Poles) are melting.
15% of ice at the North Pole
(Arctic) has already gone.
It is currently losing 14,000 square miles per year.
The Alps have lost 50% of their glaciers in the last
century.
Greenland has the biggest ice sheet in
the Northern Hemisphere.
A study in 2001 showed that
melting was lowering the height
of the ice
sheet edge by one metre per
year.
A study in 2004 showed that
melting was lowering the height
of the ice
sheet edge by ten metres per
year.
The process is accelerating
rapidly.
70%
of the world's fresh water exists as
ice at the South
Pole (Antarctica).
The South Pole is obviously breaking
up. An iceberg the size of Cyprus
has been seen breaking free from the main ice
sheet.
The average temperature of Antarctica is rising
faster
than anywhere
else, having increased by
2·5
°C since 1940.
Pollution and global climate
change is too big a
topic for this
website.
For more information on drought, floods,
hurricanes,
the loss of Australia's Great Barrier Reef (25 years to
go),
and what we can do about it, visit the
website of Greenpeace.
Headings Environmental
Issues Search Questions ![]()
gcsescience.com Contents The Periodic Table Index Quizzes gcsescience.com
Copyright © 2008 Dr. Colin France. All Rights Reserved.