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This document covers lectures about living and non-living resources. It discusses biomes and various types of resources including air, water, land, and minerals. Specific sections summarize information about human population pressures on fisheries, exploiting living resources, classification of water, threats to water resources, land as an ecosystem and for cultivation, effects of erosion, and concerns about air as a resource including global warming and the depleting ozone layer. The document provides an outline and summaries of these topics.
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ENV330 Module 4 AVP Transcript Title Slide Narrator
ENV330 Module 4 AVP Transcript
Title Slide
Narrator: In Module 4, we will consider the impact of food production and distribution and sustainable
food production. The total amount of food grown and produced for humans has increased dramatically
over the past 50 years to meet the growing demands of our human population. Agricultural production,
meat production and fish catch, both wild caught and aquaculture have all increased dramatically. The
world’s three largest grain-producing countries are China, the United States, and India.
What kinds of stresses has this placed on the natural capital and ecosystems of the world?
Slide 2
Title: Impacts of Food Production
Slide content:
[image of a desert]
Narrator: The impacts include loss of biodiversity, soil degradation, wasting and pollution of scarce water
resources, increased greenhouse gas emissions, depletion of fish stocks in the oceans, and human
health problems. According to a 2002 study by the United Nations, nearly 30% of the world’s cropland
has been degraded to some degree by soil erosion, salt buildup, and chemical pollution, and 17% has
been seriously degraded.
There are serious soil erosion problems on every continent of the world, and marine biologists say that
we’ve “fished out” much of the oceans.
Slide 3
Title: Dust Bowl in 1930’s
Slide Content:
[black and white image of a dust cloud taking over a town]
Narrator: Overgrazing, poor agricultural practices including salinization from irrigation can cause erosion,
desertification and dust storms. Deforestation of hillsides can also impact agriculture and ecosystems.
Once a hillside has been deforested for timber, fuelwood, livestock grazing, or unsustainable farming,
water from precipitation rushes down the denuded slopes, erodes precious topsoil, and can increase
flooding and pollution in local streams. Such deforestation can also increase landslides and mudflows. A
3,000-year-old Chinese proverb says, “To protect your rivers, protect your mountains.”
Waste of water is one of the major environmental problems associated with agriculture. The most
efficient (90-95%) way to get water to the roots of crops is through drip irrigation, or Low Energy Precision
Application (LEPA), which you will learn about in this module.
During the Dust Bowl in the US in the 1930’s, terribly unsustainable agricultural practices in the Midwest
breadbasket led to such dire conditions that millions of starving people migrated away from the farmlands.
Many children died from inhaling the dust. The situation got so bad that during a Senate hearing on the
issue in DC, dust from a dust storm leaked into the conference room!
A few inches of top soil is all that keeps civilization from starvation – we need to protect this vital natural
capital.
Slide 4
Title: Industrialized Agriculture
Slide Content:
[image of farm equipment on an empty field]
Narrator: Industrialized ag ...
Envir awar final
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Lec 9 10 ns5 2010
- 1. LIVING & NON-LIVING RESOURCES Lectures 9 and 10
- 2. LECTURE OUTLINE LIVING RESOURCES Biomes NON-LIVING RESOURCES Air Water Land Minerals
- 3. BIOMES
- 4. BIOMES
- 6. HUMAN POPULATION AND THE FISH BASE ARE YOU A THREAT?
- 7. THE DEMANDS OF HUMANS
- 9. EXPLOITING LIVING RESOURCES FISH KILLS FLOODS
- 10. TIME TO ACT NOW...
- 11. WATER AS A RESOURCE USES OF WATER CLASSIFICATION OF WATER THREATS TO THE RESOURCE
- 13. CLASSIFICATION OF FRESHWATER CLASS AA PUBLIC WATER SUPPLY; REQUIRES APPROVED DISINFECTION ONLY CLASS A COMPLETE TREATMENT REQUIRED (COAGULATION, SEDIMENTATION, FILTRATION, DISINFECTION) CLASS B PRIMARY CONTACT RECREATION (BATHING, SWIMMING) CLASS C PROPAGATION OF FISH; BOATING; MANUFACTURING WATER AFTER TREATMENT CLASS D IRRIGATION
- 14. CLASSIFICATION OF MARINE WATER CLASS SA PROPAGATION, SURVIVAL AND HARVEST OF SHELL FISH (COMMERCIAL PURPOSES) CLASS SB RECREATIONAL WATER (BATHING, SWIMMING, SKINDIVING); FISHERIES (BANGUS) CLASS SC RECREATIONAL WATER (BOATING ETC.); SUSTENANCE FISHING; MANGROVE AS WILDLIFE SANCTUARIES CLASS SD INDUSTRIAL WATER SUPPLY (COOLING)
- 15. THREATS
- 16. HOW CAN YOU HELP?
- 17. LAND AS A RESOURCE LAND AS AN ECOSYSTEM FOOD BASE CRUCIAL LIFE-SUPPORT SYSTEM CULTIVATION OF LAND DEVELOPED TO MEET FOOD NEEDS PROVIDE RAW MATERIALS
- 18. THE SAD TRUTH... 14.2 M HECTARES SUITABLE FOR CROP CULTIVATION 4% OF TOTAL RP LAND AREA 5.2M HECTARES SEVERELY ERODED
- 20. THE SERIOUS EFFECTS OF EROSION
- 21. LAND CONVERSION = LAND DEGRADATION INCREASED SOIL DEGRADATION BROUGHT ABOUT BY: LAND USE % CHANGE EROSION ACIDIFICATION (DUE TO AGRICULTURE 2.5 CONTINUED USE OF AMMONIUM FERTILIZERS) GRASSLAND 2.4 NUTRIENT LOSS (DUE TO PESTICIDE USE) FOREST/ 16.9 DETERIORATION OF WOODLANDS DRAINAGE CONDITIONS TODAY THE CHALLENGE: “ OTHERS 19.5 Development of Sustainable Agricultural Farming System to Support Growing Population”
- 22. HOW CAN YOU HELP?
- 23. AIR AS A RESOURCE CONCERNS: Global Warming Depleting Ozone Layer
- 24. GLOBAL WARMING
- 25. WHAT OR WHO IS TO BLAME?
- 26. GREENHOUSE GASES: THE GOOD AND THE UGLY TRUTH!
- 27. GREENHOUSE EFFECT AND CLIMATE CHANGE
- 31. THE THINNING OZONE LAYER
- 32. IS IT REALLY A HOLE?
- 33. FORMATION OF OZONE LAYER OH SO SLOW...
- 34. BUT TO DESTROY IT...
- 35. HOW CAN WE HELP?
- 36. NEXT MEETING: ENVIRONMENTAL ETHICS AND ENVIRONMENTAL LAWS