Friends of the Black Butte Trail




A quick internet search reveals the result of studies showing the amount of carbon dioxide the average tree in our forests can expect to absorb from the atmosphere per year (Someone going out to plant trees under ideal urban or suburban conditions can expect higher numbers).

50 lbs of CO2 / year
48 lbs of CO2 / year
48 lbs of CO2 / year
48 lbs of CO2 / year
11.7 to 14 lbs CO2 / year

Since the trees to be cut for the Black Butte Trail are fairly young, small, and grow in a high desert environments with limited moisture, the Tufts University numbers are probably quite representative. Were we to assume 20 pounds of CO2 per year absorption per year per tree, then 5,000 pounds, or 2.5 tons of CO2 would have been absorbed each year by the 250 trees.


Driving a car is currently the only practical mode of transportation from Black Butte Ranch and other Sisters communities. Take a look at one gallon of gasoline (octane), weighing 6.25 pounds, and containing 84 percent pure carbon. As that gasoline burns, each carbon atom combines with two oxygen atoms, now creating 19.25 pounds of CO2, still from the same gallon of gasoline. An average automobile traveling 12,000 miles each year, averaging 25.5 miles per gallon, produces 4.5 tons of CO2 per year. As shown in the tabulation of date above, listing a tree's ability of trees to absorb CO2, the 250 trees scheduled for removal would only have been able to absorb about half of the CO2 emissions from one single automobile. The average automobile produces 0.85 pounds of CO2 per mile, or 13 pounds of CO2 for every round trip from Black Butte Ranch to Sisters and back.



Come back to visit, and visit often. Our effort is just getting started.