The document discusses carbon footprints, which measure the total greenhouse gas emissions caused directly and indirectly by an individual, event, organization, or producer. It notes that the USA has the highest CO2 output per capita and that CO2 emissions have increased rapidly since 1950 based on the type of energy source used. Carbon footprints vary significantly depending on the energy source, with renewable sources like solar and wind having much lower footprints than fossil fuels like coal and oil.

1. The Carbon Footprint
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Energy,
World a Better Place to Live

2. Carbon Footprint Basics
Carbon Footprint About
Definition:
total set of greenhouse
gas emissions caused
directly and indirectly by
an individual, event,
organization, or producer

3. CO2 Worldwide
Carbon Footprint About
• USA: highest CO2 output per capita
25
CO2 Production
20
World Population
15
10
5
0

4. Reasons for emissions
Carbon Footprint Energy we use
• CO2 emission has increased rapidly since
1950 based on energy source used

5. Energy Carbon Footprint
Carbon Footprint Energy we use
• Low footprint for
renewable energy
Technology g/kWh
1170
Gas (thermal)
965
Coal
900
Oil
600
Natural gas
Gas (combined cycle) 450
50
Solar photovoltaic
5.5
Wind