Matters of Scale - Human Health and the Future

Number of people now living within the reach of malaria-transmitting mosquitoes (potential transmission zone), worldwide
2.5 billion
Number of people who will live in the transmission zone by the latter half of the 21st century, after projected expansion of the transmission zone by global warming
4.8 billion
Average number of heat-related deaths in Atlanta each summer
Average number projected by 2050, assuming no change in the city's population size or age profile, but with projected global warming
Predicted decline in production of cereal grains (rice, corn, wheat, etc.) as a result of climate change (climate effects only) by 2060,
in the developed countries
- 26.9 percent
Additional decline in grain production from physiological effects of CO2,
in developed countries
- 3.6 percent
Number of people at risk of hunger in 2060, without global warming
640 million
Number at risk with projected warming
680 to 940 million
Life expectancy in the most developed countries in 2000
Life expectancy in the least developed countries in 2000
Share of worldwide AIDS/HIV cases that are in developing countries
90 percent
Share of AIDS stories with non-U.S. settings in the U.S. media
4 percent
Sources: Climate change effects: Intergovernmental Panel on Climate Change, Second Assessment Report, 1995. Grain production decline is from a global climate change model of the United Kingdom Meteorological Office. Life expectancy: World Health Organization, World Health Report 1995. AIDS cases: UNAIDS, The HIV/AIDS Situation in Mid 1996, July 1, 1996. AIDS in the U.S. media: Covering the Epidemic: AIDS in the News Media, 1985-1996, Henry J. Kaiser Foundation Survey, June 16, 1996.