Theory: If every person on the planet planted 40 trees each it could slow climate change long enough to allow time to develop alternative technologies.
Carbon as carbon dioxide in the atmosphere: 720 billion tons. World population: 7 billion
Average number of trees per hectare of forest = 700 (Alabama Forestry Commission)
Conversion of short tons to metric tons: 0.9077
85 acres of forest yielded:
4. 581 short tons tree biomass (soft wood),
3.024 short tons tree biomass (hard wood)
Conversion to dry tons using specific gravity ratios:
4.581 X 0.483 = 2.212 short tons tree biomass
3.024 x 0.529 = 1600 short tons tree biomass hard wood)
Total tree biomass = 2.212 + 1600 short tons = 3812 short tons.
Convert to carbon mass equivalent - using figure of 50% carbon in wood (Read, 1994, p.91)
3812 x 0.5 = 1906 short tons.
Conversion to CO2 equivalent : 1906 x 3.67 = 6,999 short tons CO2.
Metric conversion: 6,999 x 0.9072 = 6,349 metric tons CO2
Conversion to per acre: 6,5257 = 74.70 tons CO2 equivalent in one tree
Average number of trees per hectare of forest = 700.
Average CO2 equivalent in one tree = 74.70 = 0.1067 tons per tree.
If every person planted one tree this would sequester: 7 billion x 0.1067 tons of CO2 = 747,000,000 of CO2.
If every person planted 40 trees, this would sequester: 747 million x 40 = 30 billion tons. CO2 in the atmosphere is 720 billion tons.
30 billion = 4.2% of 720 billion.