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The Effect of Humans
The Effect of Humans
On Ecosystems and Biological
Cycles
On Ecosystems and Biological
Cycles
Changes to the Atmosphere
Changes to the Atmosphere
The atm is a greenhouse
Normal atm composition maintains global temperature
Too much Carbon Dioxide in atm will increase global temperature.
Carbon dioxide traps suns rays rather than reflecting them back into space - global warming
The atm is a greenhouse
Normal atm composition maintains global temperature
Too much Carbon Dioxide in atm will increase global temperature.
Carbon dioxide traps suns rays rather than reflecting them back into space - global warming
CO2 Increase Due to Human Activities
CO2 Increase Due to Human Activities
Carbon dioxide has increased by 30% since the industrial revolution
Canadians release 18 000 kg of carbon dioxide/person/year
Why? Burning fossil fuels (gas, coal, oil) for
energy (factories, homes, workplaces) and transportation
Aerosols Deforestation
Carbon dioxide has increased by 30% since the industrial revolution
Canadians release 18 000 kg of carbon dioxide/person/year
Why? Burning fossil fuels (gas, coal, oil) for
energy (factories, homes, workplaces) and transportation
Aerosols Deforestation
Global Climate ChangeGlobal Climate Change
Warmer atm influences:
1) Sea levels rise (melting ice caps and glaciers)
-flooding of low lying areas and coastal regions-higher tides; coastline erosion-salt water can enter wetland ecosystems (some species may die out while others flourish)
Warmer atm influences:
1) Sea levels rise (melting ice caps and glaciers)
-flooding of low lying areas and coastal regions-higher tides; coastline erosion-salt water can enter wetland ecosystems (some species may die out while others flourish)
Global Climate ChangeGlobal Climate Change
2) Higher Ocean Temperatures
-shift in ocean population -algae blooms-decreased fish population,
species may die out
2) Higher Ocean Temperatures
-shift in ocean population -algae blooms-decreased fish population,
species may die out
Global Climate ChangeGlobal Climate Change
3) More Energy in the ATM
-severe weather: storms, tornadoes, hurricanes
-floods-droughts (increase in Forrest Fires)
This will impact AGRICULTURE, HUMAN HEALTH, and PROPERTY.
3) More Energy in the ATM
-severe weather: storms, tornadoes, hurricanes
-floods-droughts (increase in Forrest Fires)
This will impact AGRICULTURE, HUMAN HEALTH, and PROPERTY.
Hurricane Katrina
BC Forest Fires
Global Climate ChangeGlobal Climate Change
4) A Shift in Carbon Cycle
-increased photosynthesis-some plants growing faster-others may not grow due to
higher temperatures-may change nature of
agricultural crops (weeds?)
4) A Shift in Carbon Cycle
-increased photosynthesis-some plants growing faster-others may not grow due to
higher temperatures-may change nature of
agricultural crops (weeds?)
Global Climate ChangeGlobal Climate Change
5) Human Health:-increase in viruses and bacteria
that prefer warm climatese.g. malaria
-respiratory illness due to increased pollutants in air; swelling due to heat
5) Human Health:-increase in viruses and bacteria
that prefer warm climatese.g. malaria
-respiratory illness due to increased pollutants in air; swelling due to heat
Nitrogen Increase Due to Human Activity
Nitrogen Increase Due to Human Activity
Sewage plants and crop fertilizers release nitrous oxides into the atmosphere
More nitrogen is being added to the environment than ecosystems can use
Excess nitrogen in soil increases soil acidity and damages tree and plant roots
Eutrophication of lakes when nitrogen compounds build up due to sewage plant wastes; increase algae growth
Sewage plants and crop fertilizers release nitrous oxides into the atmosphere
More nitrogen is being added to the environment than ecosystems can use
Excess nitrogen in soil increases soil acidity and damages tree and plant roots
Eutrophication of lakes when nitrogen compounds build up due to sewage plant wastes; increase algae growth
Acid RainAcid Rain
-caused by burning of fossil fuels
-nitric acid and sulfur dioxide released-acidify lakes-species that cannot tolerate
acidic environment die out (Maple trees)
-degrades limestone buildings
-caused by burning of fossil fuels
-nitric acid and sulfur dioxide released-acidify lakes-species that cannot tolerate
acidic environment die out (Maple trees)
-degrades limestone buildings
What Can You Do to Decrease Greenhouse Gas
Emissions?
What Can You Do to Decrease Greenhouse Gas
Emissions? Be power smart - unplug, turn off
lights Walk, bus, carpool Fuel efficient vehicles (not SUVs) Purchase energy efficient appliances Recycle - reusable energy Plant trees near your home
Be power smart - unplug, turn off lights
Walk, bus, carpool Fuel efficient vehicles (not SUVs) Purchase energy efficient appliances Recycle - reusable energy Plant trees near your home
A Few Interesting FactsA Few Interesting Facts
If people let their dishes air dry instead of using the heat setting on their dishwashers, we could decrease CO2 emissions by 200 pounds/year/household
Painting houses dark colors in cool climates and light colors in warm climates decreases CO2 emissions by 5000 pounds/year/house
If people let their dishes air dry instead of using the heat setting on their dishwashers, we could decrease CO2 emissions by 200 pounds/year/household
Painting houses dark colors in cool climates and light colors in warm climates decreases CO2 emissions by 5000 pounds/year/house
How Much Carbon Dioxide Does Our Class Emit Getting to School?
How Much Carbon Dioxide Does Our Class Emit Getting to School?
Estimate the distance to school:
Charleswood: 3.5miles Waverly/Lindenwoods: 2.5 miles Pembina: 5 miles away
Estimate the distance to school:
Charleswood: 3.5miles Waverly/Lindenwoods: 2.5 miles Pembina: 5 miles away
Identify Transportation Method
Identify Transportation Method
Miles/gallon
Pounds CO2/gallon
Compact car
24 20
Fullsized carTruck/van
1613
2021
Bus 8 22