31

There are different levels of service. In itself planting a tree is very easy and cheap, of the 3 billion trees in the UK, most drop thousands of seeds each year and some germinate all by themselves for free. On the other hand, planting seedlings can be done mechanically using a Damcon PL10 with four row attachment, you can plant 20,000 in a day, costing ...


9

Ecologists refer to this as 'gross productivity' and define it to be dry weight plant matter per area per year. In temperate climates this is likely to be a grass. Switchgrass has been proposed as a bio feedstock, both because it's highly productive, and the plant pulls most of the necessary trace nutrients back into the roots in fall. Poplar and willow ...


7

Any time you want to give money to a charity, you should do some basic research on how the charity spends donated money. Some charities spend over 90% of donated funds on charitable works, with minimal overhead, others spend a lot of money on salaries and perks for executives, and some spend a lot of money on lobbying politicians or educating the public to ...


6

One way to look at it to compare like with like is to look at the photosynthetic efficiency since carbon is fixed through photosynthesis. By this measure, sugar cane comes on top, converting about 8% of the incomming sunlight energy into stored carbon energy.


6

I think you're up against two three at least four separate problems: The scale: rallying 1M people to plant 16k trees apiece over 20 years is no way a "guerrilla" operation; it's a mass movement. It won't be covert: everyone will know about it, and landowners will probably object more or less strenuously. The distribution: if you have anywhere near 1M ...


5

It is much easier to avoid emissions than to capture CO2. Anyway, one can roughly prioritize as follows: Leave it to professionals. There are expert organizations that focus on CO2 reduction. This is where you have the highest impact per dollar. They mostly work in developing countries, where the reduction per dollar is biggest. Here is a ranking for US-...


4

Another option that could be explored (and indeed is, to a limited extent) is the increased use of airships. Being neutrally buoyant, they need much less energy per trip, and the propulsion could be provided by solar power (they also have a large area on top of the envelope to hold solar cells). The downside, of course, is the need for large amounts of ...


4

No, and no. Current production costs of biochar are in the hundreds of dollars per tonne. (It shouldn't be that expensive.) By comparison the mining costs for coal at my neighbor, the coal mine, run about 90 cents (canadian) per ton. It will be a while. General paper about biochar with nominal $200/ton wholesale price from a unit that processes 2000 ...


4

As soon as you plant a forest it starts to decay. Initially the growth rate is faster than the decay rate. At some point it reaches equilibrium. To maximize carbon capture you want to plant something that adds biomass quickly. To keep it sequestered, you need long life. Your best strategy is to plant fast growth trees for your area, coupled with shade ...


4

The answer is: Unknown. So try it. We need more data points. In general if energy can be extracted from a reaction, some bacteria does it for a living. Given the nature of certain ecozones, notably various pines that have a strong firesuccession (Lodgepole, Jackpine) then a series of low temmperature burns should leave substantial carbon in the soil. ...


4

The short answer is no, not anywhere close to 200ppm and not appreciably lower than ambient conditions. The modern standard for buildings is a full air change every three hours. This means your houseplants would need to achieve your target level on a full house volume of air every three hours. There is no practical arrangement which will achieve this. ...


3

Both of the links you shared are important videos to watch for anyone interested in learning about the process and should be considered required viewing material in classrooms where agriculture is taught. The process works well and can be applied to other kinds of livestock as well. The "chicken tractor" is a popular method that employs similar techniques ...


3

An unexploited forest has many benefits but carbon sequestration is not an exclusive driver. You can invert the logic and argue that any wood used for making durable things is an additional carbon storage opportunity. To capture carbon, plant growth must be sustained while preventing burning or decay in the open. Once the growth/decay equilibrium is ...


3

Gail Taylor's team at the University of Southampton is looking at almost exactly this question. Their primary focus is on fastest-growing bioenery crops, but the answer is going to be pretty much the same as for your question, as carbon sequestration is roughly the same as bioenergy accumulation. They are concetrating on three species currently: poplar, ...


3

Since grass and switchgrass already been mentioned; Hemp and Paulownia tree may be the alternative answer. They are among the fastest growing plants. For hemp, one unit land area of hemp(s) can produces as much cellulose as 4 unit land area of trees.


3

Air travel sustainability problems, even if you limit the category to climate change impacts, are not limited to greenhouse gas emissions. Atmospheric transport of emissions is difficult and, since jet fuel isn't a pure (or even homogeneous) substance, it's not always possible to know what is coming out of the aircraft in what concentrations. Biofuels were ...


3

I found this article regarding lawns. It suggests that lawns could be regarded as carbon sinks only if they are not (frequently) mowered, and do not use pesticedes. Also: An acre of established temperate forest can hold from 2,000 lbs. up to 6,000 or more lbs. of carbon per year, depending on the age of the trees and other conditions. Mature ...


3

For all-electric passenger jets, battery capacity must increase to hold four times more energy per unit mass Currently available batteries have poor specific energy compared to jet fuel: Jet fuel: 11.9 kWh/kg Diesel: 13.3 Gasoline: 12.9 Lithium metal batteries (e.g. LiPo): ...


2

I wonder how much carbon dioxide does grass sequester, compared to trees. Moreover, is grass still efficient in absorbing pollution? It seems to me that grass would be more efficient in storing carbon in soil than trees. Where I live, trees grow 7 cubic meters per hectare per year. One cubic meter is 0.5 tonnes so this is 3.5 tonnes per hectare per year. 1 ...


2

I believe its all about mass, biomass is effectively sequestered CO2. In year one a lawn probably has a greater mass than a one year old tree, and so more CO2 sequestered. But in year twenty the tree has a greater mass about 1 tonne which is 3 tonnes of CO2, and the lawn, if its been regularly mowed still only has the same biomass as it did in year one. Of ...


2

If you are going to use wood gas to run a generator, don't bother removing the CO. Burn it. https://www.youtube.com/watch?v=X3KipK49v7g is a vid on making a woodgas powered truck. That said: Consider getting a manual transfer switch, and a gas or diesel powered generator. While the power may have been off for 10 days this time, I found in our (shorter) ...


2

This master's thesis by Dahiru Rufai Ahmed at the university of Oulu provides a comprehensive background into the removal of CO2 from wood gas. On pages 36-37 it mentions the water-gas shift (WGS) reaction as a method of adjusting the hydrogen/carbon monoxide mixture or removing CO entirely to get pure H2. "The WGS reaction is an exothermic reaction (∆Hr ...


2

By moving a tree from one area to another, that's -1 tree to the source and +1 tree to the destination, for a net change of 0 trees over the region. That probably won't make much of a difference overall. The specific tree being moved might fare slightly better or worse over its lifetime, which could have a small impact, good or bad. Maybe the real question ...


2

I think you'll find that in areas where forests are managed, baby trees come from a central location the only purpose of which is to grow lots of these small baby trees. The trees are used to create a new forest in an area where the old forest has been cut down for timber. In contrast to letting the new forest be naturally seeded, obtaining the baby trees ...


1

You can start growing an exploiting a Moso bamboo forest. Bamboo is known for growing fast and storing a lot of CO2. It is said that one hectare of Moso Bamboo can store up to 250 tons of carbon. Each year, a hectare of Moso bamboo absorbs 5.1 tons of carbon. Source: matteroftrust.org/what-can-bamboo-do-about-co2


1

I suggest a variation on juhist's forest landfill proposal: Assuming budget isn't an issue, and you're very patient, I'd suggest: buy land adjacent to a viable (native or at least non-monocultural) forest. Encourage the forest to expand onto it. Remove trees at a sustainable rate (you'll need to study forestry a little, did I mention that?) and use them for ...


1

Cattle have become unpopular because they have been accused of farting methane. This is the main answer to your question. However in ecologically sound pastures cattle do restore CO2 to the soil, and they probably fart much less. If their "emissions" have been measured on cattle fed on a single species of newly sown grass, or on silage, they would not be the ...


1

Trees follow the logistics curve for growth. More complicated, the number of trees descreases as they get larger. E.g. after a forest fire, lodgepole pine sprout at about 10 per square foot. In 10 years there is about 1 per square yard. At 30 years it's one per 6 foot square. The fastest mass growth rate is when a given area is mostly at the 1" diameter ...


1

There are many problems with the article you cited, but I agree with the main point it makes about the need for extensive research before any global scale solution should be attempted. Nevertheless, extensive field trials are not required to definitively prove the effectiveness of biochar to sequester carbon. Simply dig a hole in poor soil one foot wide and ...


1

There is certainly one way how to do carbon sequestration with biochar: fill empty coal open pit mines with that charcoal, and cover with soil. That's how the fossil fuel in that pit was stored for a very long time before humans thought it's a good idea to dig it up and burn it. When wanting to give biochar simultaneously tasks for soil amendment, it ...


Only top voted, non community-wiki answers of a minimum length are eligible