Am I stoned?



Download 238.52 Kb.
Page12/31
Date04.05.2017
Size238.52 Kb.
#19242
1   ...   8   9   10   11   12   13   14   15   ...   31

Deforestation: Causes

  • Cattle ranching
  • Drug cultivation -Peru, Bolivia, Columbia

Clearcutting

Clearcutting

Clearcutting with Corridors

Global Warming

Global Warming

  • Greenhouse effect
    • 30% increase in atmosphere CO2 since industrialization began (6.25 billion tons/year)
    • Fossil Fuels (CO2)

Global Warming

  • Greenhouse effect
    • Methane, choloroflurocarbons, nitrous oxide, sulfur oxides
      • Methane 34 times more heat than CO2 (over 100 yrs), large amounts stored in permafrost
      • Aliso Canyon (CA) leak (2015) worst man-made greenhouse gas disaster in U.S. history
    • Obesity

Global Warming

  • 80% of carbon emissions from burning fossil fuels; 20% from deforestation, other land use changes
  • 404 ppm CO2 (280 ppm pre-industrial; over 350 ppm dangerous)

Global Warming

  • CO2 currently being released at almost twice the rate it is being removed
    • Plants and soil absorb 1/3, ocean waters about ¼, the rest stays airborne
  • If all identified fossil fuels on planet were burned (all 5.5 trillion tons of oil, coal, and natural gas now underground), the earth could heat up by as much as 18 degrees

Global Warming

  • Sources of methane:
    • Natural – 41%
      • Wetlands - 29%
      • Lakes, wild animals and termites, bodies of water - 12%
    • Human Influenced – 59%
      • Animal agriculture – 21%
      • Natural gas / oil – 13%
      • Waste disposal – 10%
      • Coal and biomass – 7%
      • Rice – 6%
      • Other 2%

Global Warming

  • The last 20 years have been the hottest ever recorded (data go back to 1856)
    • 2016 hottest year on record
  • Average global surface temperature = 58.3°
    • Hottest temperature in last 10,000 years

Global Warming

  • Worldwide average temperature increased by 1.6° F between 1901 and 2012
  • Estimated 4.5-9 degree increase in average global temperature by 2100
  • Far North, Pacific Northwest warming up faster than other parts of the planet

Consequences of Global Warming

  • Global warming:
    • 400,000 deaths and 5.0 - 5.5 million disability-adjusted life years lost per year (Climate Vulnerability Monitor, WHO, UN Environment Program)
    • Expected to double by 2030
    • 5% of existing disease burden due to climate change carried by children under 5 (in industrialized and developing countries)

Consequences of Global Warming

  • ↑ Weather extremes/natural disasters/insurance claims
      • Drought, flooding, severe storms
      • Weather-related disasters caused over $140 billion damage, cost U.S. taxpayers $100 billion (2012)
      • 90% of disasters in U.S. result from flooding – National Flood Insurance Program phasing out flood insurance, $24 billion in debt, unable to pay off Hurricane Katrina and Sandy claims

Consequences of Global Warming

    • Ocean acidification →
      • Decreased plankton (basis of the ocean’s food chain)
      • Corals dying
      • Rise of jellyfish (cockroaches of the sea), crabs, and oysters
      • Entire ecosystems affected

Consequences of Global Warming

    • Floods, cholera, rising malaria zone
    • Dengue fever, malaria, yellow fever, even plague now being seen in Europe
  • Increased Chagas, yellow fever, chickungunya virus in U.S.

Weather Extremes Headline from “The Onion”

Consequences of Global Warming

  • Polar icecaps/glaciers/Greenland ice sheet/Patagonian glaciers/Himalayas/permafrost melting, sea levels rising (est. at least 3 feet over 21st Century)
    • Glacial lake outbursts (tsunamis) possible
    • 13 of world’s 20 largest cities are coastal; 1/3 of world’s population lives within 60 miles of a shoreline

Consequences of Global Warming

  • Arctic ice pack has lost 40% of its thickness compared with 1960
  • West Antarctic ice sheet in irreversible collapse
  • Arctic and boreal forests warming twice as fast as other parts of the world
    • Contain 30% of globe’s forest cover

Consequences of Global Warming

    • Beach resorts losing sand, suffering economic losses
    • Sand forms over thousands of years
    • Most used in construction industry
    • Large countries mine seabed
    • Poor island residents sell sand, eroding beaches
    • Large black market trade in illegal sand

Consequences of Global Warming

  • Glacier National Park’s glaciers melting (150 one hundred years ago, 25 in 2014, none expected by 2030)
  • Great Lakes ice coverage down 71% over last 40 years
  • Snows of Kilimanjaro down 85% compared to 1912; may be gone by 2020s
  • Ski resorts making snow, suffering economic losses

Consequences of Global Warming

  • Wildfires, droughts
  • World’s oldest/biggest trees dying (10X background rate)
  • Ice islands threaten shipping lanes and offshore oil platforms
  • 3% increase in violent crime/1° F rise in avg. temperature (Science, 2013)

Glaciers Calving

Polar Bears Stranded / Dying Off

Greenland’s Ice Cap Melting: 1992

Greenland’s Ice Cap Melting: 2002

Greenland’s Ice Cap Melting: 2005

Atlantic Ocean Excited To Move Into Beautiful Beachfront Mansion Soon (Headline from “The Onion”)



Download 238.52 Kb.

Share with your friends:
1   ...   8   9   10   11   12   13   14   15   ...   31




The database is protected by copyright ©sckool.org 2022
send message

    Main page