I highlighted a range of environmental issues and challenges which
face our planet under pressure in the 21st century,
including those arising from climate change and expected increase
in human population.
section highlights how Earth observation satellite programmes support
both the information needs of the main Earth system challenges and
more immediate needs for information in the social, economic, and
order to illustrate the importance of Earth observations from satellite,
five case studies
observations, including of El Niño;
each case, the issues affecting society and the anticipated future
consequences are discussed. The need for information and the role
of Earth observation satellites is explained, including an indication
of future plans.