1 / 20

Chapter 22-2 and 22-3

Chapter 22-2 and 22-3. Environmental Issues & Environmental Solutions. 22-2 Environmental Issues Pollution. Pollution causes SMOG Water vapor mixed with chemicals from human activities (burning fuels, using chemicals, etc.)

frye
Télécharger la présentation

Chapter 22-2 and 22-3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 22-2 and 22-3 Environmental Issues & Environmental Solutions

  2. 22-2 Environmental IssuesPollution • Pollution causes SMOG • Water vapor mixed with chemicals from human activities (burning fuels, using chemicals, etc.) • Can contain nitrogen oxides, sulfur oxides, organic chemicals, small particles & ozone

  3. Air Pollution • Ozone Thinning • Ozone (O3) in stratosphere • Protects from UV radiation (UV light) • Chemicals, such as Chlorofluorocarbons (CFC’s), cause reactions that break down ozone • Thinning of the ozone layer in the polar regions • Most countries no longer produce CFC’s

  4. Global Warming • Relationship between average CO2 levels & average global temperatures • Cause-and-effectrelationship: A change in one variable causes a change in another variable

  5. Acid Precipitation • Precipitation that is acidic because air pollutants combine with water in the atmosphere • Changes pH of soil & water • Can cause disease or death in plants & animals

  6. Land & Water Pollution • Human activity produces chemicals that pollute the land and the water. • Biological Magnification • Process where chemicals become more concentrated in an organism higher on the food chain that the organism is in.

  7. Ecosystem Disruption • Ecosystem Disruption • The destruction or substantial change in the functioning of natural ecosystems • Can disrupt species or entire communities

  8. Ecosystem Disruption • Extinction • Endangered- number of organisms is so low the organism is in danger of becoming extinct • Extinction- every organism in a species has died • Causes • Habitat destruction, hunting, harvesting, invasive species

  9. Ecosystem Disruption • Ecosystem Imbalances • Keystone Species- A species that impacts the other species in the community • Causes- Overuse of resources, human impact

  10. Human Resource Use • Primary Production- the total energy stored through photosynthesis • Humans use 10-55% of the Earth’s primary productivity

  11. Human Resource Use • Ecological Footprint- the analysis of human impact on the ecosystems • Includes use of food & natural resources, production of wastes & pollution • Biosphere has limited capacity to renew or repair

  12. Human Resource Use • Sustainability- the ability to meet human needs so that the population can survive indefinitely • Humans need to close the gap between the Earth’s renewable resources & capacities, our own needs and the needs of other living species • Possible Solutions: • New technologies • Slow or reverse population growth • Reduction of consumption of resources

  13. 22-3 Environmental SolutionsConservation & Restoration Biology • Conservation Biology- scientists identify, protect & manage natural areas to retain biodiversity • Restoration Biology- scientists address extreme cases of ecosystem balance and develop a plan to restore the ecosystem to its original state

  14. Conservation & Restoration Biology • Species & Habitats- are interconnected • Bioindicator- a species that is especially sensitive to ecological change • Whooping Crane- an example of the interconnectedness between species & their environment.

  15. Protecting Ecosystems • Many considerations to balance ecosystem preservation & human rights. • Protection focuses on regions with the most biodiversity • Biodiversity Hotspots-Ecological regions that are the richest in unique species and in most need of protection

  16. Governments & Laws • Laws& policies exist to address environmental issues • International laws & policies also exist • Debt-for-nature swap- richer countries or private organizations fund some debt of a developing country in exchange for preservation & conservation efforts

  17. Private Efforts & CooperationYour Role in the Environment • Ecotourism- tourism that supports the conservation of ecologically unique areas and also support the economy • Urban Ecology- Study of biodiversity in areas densely populated by humans

More Related