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13 votes
Accepted

Which consumes more carbon dioxide: a fully grown forest or a newly planted one that is growing?

A forest of old trees sequesters more carbon per year than a forest with the same quantity of young trees. When I first saw this question I thought I knew the answer -- trees grow faster when they're ...
LShaver's user avatar
  • 11.9k
7 votes

Which consumes more carbon dioxide: a fully grown forest or a newly planted one that is growing?

As LShaver writes, larger trees sequester more carbon than smaller trees, but only if they are still growing. In a "fully-grown" forest (as per the title) that process has ended — decay and regrowth ...
Tim's user avatar
  • 2,844
4 votes

What is the minimum indoor CO2 concentration that is achievable using houseplants?

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 ...
Jean-Paul Calderone's user avatar
4 votes

What's the fastest growing plant by carbon density?

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 ...
underscore's user avatar
3 votes

What the best plant to grow on human waste and fix CO2?

Depending on the size (esp height) of your growing spacec. One of the following would work: willow (Salix spp), elephant grass (Miscanthus fuscu), or as @JChomel mentions, bamboo. Willow is ...
Conor's user avatar
  • 281
3 votes

What the best plant to grow on human waste and fix CO2?

Growing plants inside to consume CO2 will need a huge energy input. If your plants are indoors behind a huge window with long sun exposure, then it is ok. If you intend to provide artificial light to ...
J. Chomel's user avatar
  • 1,417
2 votes

Best vegetables for roof top garden?

I'd go for a quick green leafy crop, silverbeet, kale or spinach in the winter, lettuce or rocket in the summer. Those are all shallow rooted and will recover from being too hot and dry for a day if ...
Ⴖuі's user avatar
  • 1,307
2 votes

Is grass efficient for carbon sequestration?

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 ...
juhist's user avatar
  • 5,099
2 votes

Is grass efficient for carbon sequestration?

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 ...
Christopher Gilmour's user avatar
1 vote

What kind of experiment could be conducted to determine how harmful different kinds of soap are for cleaning floors?

It would be much easier as well as more informative to use small pots of something fast growing. Cress, for example, though with a plant with bigger seeds you could count them and compare germination ...
Chris H's user avatar
  • 2,126
1 vote

Hyper carbon accumulator(s) for backyards

This article (and the "Part two" it links to) gives a lot of technical detail and some practical advice: Why Not Start Today: Backyard Carbon Sequestration Is Something Nearly Everyone Can Do. In ...
M Juckes's user avatar
  • 1,021
1 vote

What is the problem in my aquaponics system?

To determine if lighting levels are responsible, I suggest you put similar plants (tomatoes, cucumbers and green beans) into self-contained pots (using potting mix) and sit them within the same ...
Highly Irregular's user avatar
1 vote

Is grass efficient for carbon sequestration?

Two things you need to consider: Storing more CO2 in the soil means you want to have more life in there. This points to the avoidance of fertilizer and pesticides in your lawn. Peat has a huge ...
J. Chomel's user avatar
  • 1,417

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