5.11 Ecological Footprints and 9.3 Greenhouse Effect

Ecological footprint

A measure of how many resources a person uses, expressed in an area of land.

The 5 variables involved in calculating an ecological footprint:

1. Carbon footprint (Energy)

2. Built-up land (Settlements)

3. Forests (Timber and paper)

4. Cropland and Pasture (Food and fibers)

5. Fisheries (Seafood)

Where does the greenhouse effect takes place?

The Troposhere

How does the greenhouse effect keep the Earth warm?

The sun’s solar radiation warms the Earth, greenhouse effect keeps the Earth at a temperature that can support living

Where is the Ozone layer located?

Stratosphere

Greenhouse gases include:

• Carbon dioxide

• Methane

• Nitrous oxide

• Water vapor

• Tropospheric ozone

• CFCs

• HFCs

Which gases are manmade?

CFCs and HFCs.

Which gas has the lowest global warming potential, but has greatest impact on the greenhouse effect?

Carbon dioxide

What does GWP stand for?

Global Warming Potential