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What is an ecological footprint?
Ecological Footprints are…
a measure of human impact on the Earth. The footprint equals the Earth’s cost to sustain one person. It’s measured in hectares and represents the land area needed to provide resources and absorb waste and greenhouse gases produced by an individual.
What are the numbers? World Average – 2.2 hectares
Biggest Footprint – United States – 9.6 hectares
Smallest Footprint – Bangladesh – 0.5 hectares
Average Canadian Footprint – 8.6 hectares
Canada has the 3rd highest footprint in the world!
Why is Canada’s average footprint so big?
What do we “need”? We require …..
• 0.2 hectares of land for water (to drink & provide seafood) hectares of land for home and roads and factories that make the
material things we grave
• 1.6 hectares of land for farmland to grow the food we eat
• 0.3 hectares of land for grazing land for meat and dairy
• 1.4 hectares of land for timber wood and paper products
• 4.7 hectares of land and needed to absorb the greenhouse gases produced by driving around town, through the running of air conditioners and the import of exotic goods and foods
= 8.6 hectares
Ecological Impact of Nations The map on the following slide shows various
countries and regions of the world proportionate to their production and consumption of commercially traded fuels.
All figures are in million metric tons of oil equivalent.
Ecological Impact of Nations
How Much Land do we Have?
Defining Environment & Sustainability
Stewardship refers to the responsibility we all have to the environment and resources that has been left to us by our ancestors. We are all stewards to our planet.
Sustainability refers to the ability to develop in order to meet the needs of the present without negatively affecting the ability of future generations to meet their needs
Defining Environment & Sustainability
If we are not all following our role as stewards in the global village, then we will not have a sustainable environment for our future children.
“We do not inherit the earth from our grandparents, we borrow it from our children.”
We must all do our part to keep our consumption of resources to a minimum, and to keep the environment around us clean.
Are you doing your part?
How a Greenhouse Works
The sun’s rays are
strong enough to
pierce through the
glass of the
greenhouse.
The rays become weaker
once they bounce off
something, so they are not all
able to pierce back through
the glass… the temperature
inside rises.
Sun’s rays
Some rays are
strong enough
to escape back
into space
Some rays are
held in by the
atmosphere
Atmosphere
The Greenhouse Effect - Now
The Greenhouse Effect - Now
Sun’s rays
More rays are
held in,
warming up
the Earth
A thickened
atmosphere,
caused by pollution
Climate Change is a major shift in the overall temperature levels of the Earth (up or down).
Global Warming is the rising of the average temperature of Earth.
The Greenhouse Effect is the trapping of heat by the Earth’s thickened atmosphere. This is caused by pollution.
Defining Environment & Sustainability
Who Will Speak for the Trees?