Obamot wrote:that must make tons of CO2 (human activity would represent only 4 or 5% of the gas in total). There are much more dangerous gases for the greenhouse effect, which we do not talk much about. Like methane.
I don't think there is a lot of methane coming out of a volcano but yes a volcano can "pollute" in a few hours what man takes decades to do... but don't let that become an argument to minimize the human impact (I see it coming like a house in the coming days).
A volcano has no consciousness ... and the 2 effects will be CUMULATIVE ...
This morning no big change in southern Belgium: there are clouds as usual
So where is the ecological "benefit"? How many trucks for a plane?
The truck, if it is not blocked and turns "for nothing" has a performance much higher than the best planes.
Example on energy consumption / CO2.
The best planes are below 3 L / 100km. Passenger if the average passenger is 120 km (with suitcases) then this makes a specific consumption of the order of 3 / 0.12 = 25 L / 100km.
The consumption of a truck is between 30 and 50 L / 100km ... for 30 tonnes displaced!
The CS is therefore of the order of 50/30 = 1.6 L / 1000km. Useful ton take 2 in an unfavorable case.
A truck is therefore 10 to 15 times better than the best planes in consumption per payload moved.
A car on the other hand is of the same order of magnitude as airplanes (strongly depends on the average load of the car).