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Challenge of Global Hazards for the Future
Climate change has implications for economic growth, human security and social well being,
especially for the poorest people and most marginalised people.
Populations are increasing and placing demands on water supplies for agriculture and industry. Water
demands could rise by 50%, especially in far eastern countries.
The World Bank estimates that 50% of the world's population will face
severe water shortages by 2025, mainly concentrated in Africa, the
Middle East and southern Asia. Currently 2.8 billion people experience
water stress, (lack of safe, reliable supply).
The problem is not due to global warming, but is made worse by climate
change issues such as high temperatures in cities, unreliable supplies of
rain for agriculturalists and deteriorating pastures for nomadic herders. In
the high Andes and Himalaya's, the disappearance of glaciers means that
people can no longer rely on glacial melt water as a water source. Rapid
changes mean people don't have time to adapt e.g. central American
indigenous people are suffering badly from climate change but are least
equipped to act.
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Food security means population having access to enough food for an active, healthy life.
Food insecurity results from either a lack of available food due to physical factors such as climate, or
where there is adequate food available but the community or individual is too poor to access it.
Higher temperatures stress crops and reduce yields. However prolong growing periods.
Higher concentration of CO2 speeds plant growth and increases resilience to water stress.
Certain areas will have more rainfall.…read more
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Renewable Energy Projects:
Large scale renewable energy projects such as the Three Gorges Dam in China have many
environmental negatives as well as the positives of providing large quantities of `green' electricity,
controlling floods on the River Yangtze.
Biofuel crops provide renewable energy but take up vast amounts of land which could be
used for foodstuffs. Deforestation in order to grow biofuel crops, increases CO2 emissions.
Wind farms generate `green electricity' yet cover large amounts of countryside and coasts.…read more