This page contains a Flash digital edition of a book.
The health of millions of people could be at risk from Freshwater supply
increases in malnutrition, extreme weather, more di- Climate change is expected to have a crucial impact
arrhoeal diseases, heart and breathing problems on all sectors and regions. It would worsen current
caused by climate-induced ground-level ozone, and water stress
4
caused by population growth and
the spread of some infectious diseases. But there may economic and land-use change.
be some benefits, for instance to those who suffer
from the effects of very cold weather. For other issues, Regionally, glaciers and snow fields are crucial
effects will be mixed. In some places the geographi- sources of fresh water. They have undergone recent
cal range of malaria distribution could contract, while widespread and severe loss from melting, and this is
elsewhere it will expand and the transmission season projected to accelerate this century, reducing water
may be changed. Overall, the negative health effects
of rising temperatures are expected to outweigh the
4. One definition of water stress is the situation that occurs when a
benefits, especially in developing countries. country uses more than 20 per cent of its renewable water supply.
Water stress and climate change
Water stress: ratio between withdrawal and availability (in 2000)
Global regions where
no stress low moderate high very high
climate change is projected
to decrease annual runoff
0 0.1 0.2 0.4 0.8 and water availability Source: IPCC, 2007.
Projected climate change and its impacts 29
Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60
Produced with Yudu - www.yudu.com