10.  How much CO2 is added to our atmosphere each year?  Where does it come from?

 

·        200 billion metric tons have been released into atmosphere since start of industrial revolution. 

·         Of all the carbon emissions from burning fossil fuels since the start of industrial revolution, half have been made in the last 20 years.

·        Power plants release carbon dioxide when they produce energy.  In 1998 U.S. electric utilities released about 550 million tons into the atmosphere.

·        In 1998, U.S.  transportation fuels accounted for almost 500 million tons of CO2 emissions

·        Cars account for more than 40 per cent of our oil consumption and transportation as a whole accounts for a huge 70 per cent. America has five per cent of the world's population, and consumes over 25 per cent of the world's oil.

 

 

    • Tropical deforestation annually accounts for about 8 billion tons of CO2 - as much as the combined fossil fuel emissions of the US and European Union. The environmental value of curbing deforestation therefore exceeds anything deliverable by the Kyoto Treaty.
    • In less than 50 years, more than half of the world's tropical rainforests have fallen victim to fire and the chain saw and the rate of destruction is still accelerating. Unbelievably, over 200,000 acres of rainforest are burned every day. That is over 150 acres lost every minute of every day, and 78 million acres are lost every year!

There are other greenhouse gasses besides CO2.  Here’s a list.

 

Global Warming Potentials (GWP) and Atmospheric Lifetimes (Years)

Gas

Atmospheric Lifetime

GWPa

Carbon Dioxide (CO2)

50 - 200

1

Methane (CH4)†

12±3

21

Nitrous Oxide (N2O)

120

310

HFC-23

264

11,700

HFC-32

5.6

650

HFC-125

32.6

2,800

HFC-134a

14.6

1,300

HFC-143a

48.3

3,800

HFC-152a

1.5

140

HFC-227ca

36.5

2,900

HFC-236fa

209

6,300

HFC-4310mcc

17.1

1,300

CF4

50,000

6,500

C2F6

10,000

9,200

C4F10

2,600

7,000

C6F14

3,200

7,400

SF6

3,200

23,900

 

And here are a few more interesting CO2 figures:

  • 28,400 lbs for an average U.S. house in a year
  • 26,500 lbs for two family vehicles in the U.S. in a year
  • 880,000 lbs for a 747 passenger jet traveling from New York to London.