CO2 SequestrationUpdated: May 21st, 2023Created: March 25th, 2021
The ELF land, although largely a wildlife habitat with notable CO2 absorption value this is not part of ELF's aims but rather a consequence of ecological aims.
I'm prompted to write about trees being used for carbon offset via sequestration after I received a flyer, from the Liberal Democrats, touting initiatives on climate issues. I consider it a serious and fundamentally flawed proposal.
The two relevant issues that were brought up in flyer are:
1. The planting of trees to sequester CO2
2. The public supply of electrical charging points for the forthcoming electric car use.
The electric car although an idea that need have nothing to do with climate change has become intrinsically linked to a reduction in CO2 emissions. However the offset damage is not as prominently displayed, unsurprisingly ~ the details of which will follow.
The planting of trees to sequester 50 million tons of CO2 from 80,000 hectares of land
Planting trees is of no consequence to the overall CO2 sequestration as is deceptive for the following reasons.
- Planting tress requires land which is presumably already covered in vegetation
- Annual crops for clothing food and fuel cannot be reduced and the extended use of puffed rice packaging, crops for ethanol etc are already taking valuable resources for food etc,
- The active cultivation of trees requires management, which in turn requires people hours and machines which in turn use more resources. Allowing land to naturally regenerate produces no extra human consumer cost in terms of food and fuel etc.
- Trees on average collect can store some 2.5 tons of carbon in a year over the life of it's growth which culminates around 30 year whence the tree shed as much carbon debris as it absorbs. On this model the population of Plymouth would need the whole of Cornwall every 30 years to offset its carbon footprint.
- Trees are not the best carbon holders per surface area depth is very important as in marshes & wetland: https://www.bbc.co.uk/news/av/science-environment-56450965
The carbon footprint is a figure that represent is the amount of land an individual would require for their energy consumption if that used bt coal, nuclear and wind farms etc were to obtained via vegetable biomass. This was in 2010 some 12.5acres per inhabitant of Plymouth.
The footprint isn't just about carbon in it's present state and includes al consumption which brings me to the concept that electric cars are somehow an improvement, they are not. Electricity just shifts the burden of exploitation to other shores or offshore.
Li : wind
May 2023 Update
The newest crazy idea promoted by the BBC of using Basalt Rock
Taking some figures
- Weight of rock to remove 1 ton of CO2 .. 4 Tons
- CO2 emission per person in UK .. 7 Tons
- Number of people in UK .. 70 Million
- Amount required per year is 4 x 7 x 70,000,000 = 1,960,000,000Tons
So one person would require 7 x 4 or 28 tons.
25,000 Kilos, for a 65Kg person that eats1Kg food a day
And this has to be spread thinly over the land.
Land available is 241,930 Km2
1960000000 divided by 241930 = 8102 or 81Tons per Km2 or .8Ton per hectare ?? every year, and of course lets not talk about digging it out, crushing it and moving it and spreading it and the fuel and machinery and man hours used to do that.