Chapter 12Ecological State of the WorldSustainable DevelopmentHow?Populations ProblemsReducing BirthratesResource Problems & ProgressForestsLandWildlifeWaterSeas and FishGround QualityWater QualityAir QualityOzone LayerEnvironmental PessimistsEnvironmental OptimistsChapter 12Preserving and Enhancing the BiosphereEcological State of the World•Environmental Pessimists•Environmental Optimists•Sustainable Development - "meeting the needs of the present without compromising the ability of future generations to meet their own needs" The World Commission on Environment and DevelopmentSustainable Development•Carrying capacity: Exploding population x consumption x waste = potential problems.Sustainable Development: the ability to continue to improve the quality of life of those in the industrialized countries, and particularly, those in the less developed countries while simultaneously protecting the Earth’s biosphereHow?1. Restrict Development2. Pay for Sustainable Development3. Hold Earth SummitsPopulations Problems•United Nations Children’s Fund•World Health Organization•1994 United Nations Conference on Population and Development•Population Control and Reproductive Health•Abortion issueReducing Birthrates1. Social2. Economic3. PolicyPopulation has slowed down.Photo available at fixedreference.org and scienceahead.blog.dada.netResource Problems & Progress•Supply of oil, gas and mineral resources•Supply and Demand•Drilling vs. harm to environment•Depletion of copper, lead, mercury, tin and zinc•Need to maintain the economies and standards of living while promoting economic development and managing natural resourcesForests•UN Food and Agriculture Organization reports depletion of forest due to population growth and development.•Answers:1.Conservation2.Lessen economic incentives for cutting down3.Educate about side effects such as global warming.Land•Erosion of topsoil•No tress = runoff, silt clogs, etc.•Unchecked runoff can lead to mudslides, loss of life•UNEP says 3.5 million square miles degraded•Worst Case scenario desertificationWildlife•Deforestation•Economic value (example: Komodo dragon $30,000 in Indonesia)•Many argue problem grossly exaggerated•Endangered Species ActWater•Water, water everywhere and not a drop to drink.•Water usage in LDCs will increase as economic development and production increases•Global water will decline by 1/3 by 2050•1st water treat signed 4500 years ago by Sumerian City-States•Sustainable Water Resources RoundtableSeas and Fish•Regulation of fisheries•Effects of natural disasters•PCBs and other pollutants•Role of consumers (don’t want whales killed, don’t buy)Ground Quality•Less predominant environmental issue•Becomes a domestic policy issue b/c of borders•LDCs subletting as disposal sites new issue•Multinational corporations often cause issues of ground pollution•Regional Agreements for protection include Convention on Control of Transboundary Movements of Hazardous WastesWater Quality•Spills•Pollution•Wastewater runoff•Dumping•International Maritime Organization proactive•Stockholm Convention on Peristent Organic PolluntantsAir Quality•Air pollution from sulfur dioxide, nitrogen oxides and suspended particles (dust, soot) case 500,000 deaths per year.•Beijing’s air pollution is 346% higher than anywhere else•Pollution control policies have drastically reduced emissions in recent yearsOzone Layer•UNEP Conferences•Buildup of CFCs down until 1994 then back up.•Sustainable development and economic advancements in LDCs = lower CFC use•China has vowed to end CFC by 2010•Global Warming IssueEnvironmental Pessimists•Humans wrecking earth•Impact of global warming nonreversible•Change already doneEnvironmental Optimists•Pessimists are alarmists•Natural progressions•Downplay damage •Positive steps