16

Education, education, education. Also healthcare, and access to contraception. I don't have any references available, I'm afraid, but repeatedly we have seen that when standards of education are improved in a community - especially education of women - birth rates go down. When child mortality goes down, so does fertility, but that has little effect on ...


8

This paper suggests that one 20 year old tree will sequester 1 tonne of Carbon which is 3.67 tonnes of CO2 which is roughly a year's CO2 footprint of one UK person or a third of a US person. However, your question is about planting one tree, which is subtly different. In order to get a decent healthy twenty year old tree, you need to plant about twelve ...


6

Would levying taxes on non-organic meat be an effective means to reduce consumption and thus reduce the environmental harm? Yes. But. It would add complexity compared to just taxing all meat, and thus make the tax less efficient. The increased costs would be the primary cause of reduced consumption. Whether only taxing conventional meat would have a ...


6

I'll split this answer into two parts: the political and the personal Political impact Whatever political system you live in, you have some route to make a political impact. The amount of impact will depend on your exact circumstance, but you will have some impact somewhere: through your elected representative, through a national political party, through a ...


6

I'm unable to give a complete answer for oil and gas. But regarding coal, from trees, its not simply a question of the area whether it was a continent size landmass, but more of the temporal side of things. Coal was laid down from plant matter during the carboniferous period, which lasted 60 million years, 60,000,000 years. For most of that time the micro-...


5

This depends obviously on the size of the tree, but I read somewhere that a tree ready for harvesting into sawlogs can be about 0.6 solid cubic meters in a boreal taiga forest (spruce or pine). One solid cubic meter sequesters approximately one tonne of carbon dioxide. So, 11 billion trees will sequester 6.6 gigatonnes of carbon dioxide. According to https:...


3

THelper did the heavy lifting, but I did some additional digging and found some more info. The official UN closing press release from the climate action summit includes this paragraph: 65 countries and major sub-national economies such as California committed to cut greenhouse gas emissions to net zero by 2050, while 70 countries announced ...


3

Each offset program is problematic in its own way. We can't (feasibly) put carbon back; we can only try to store away what's already out there, or give more people more options to develop without hydrocarbons. Consider giving to organizations that protect forests and other natural areas to preserve existing trees through policy action or by buying land, ...


3

It may sound contradictory, but according to scientist and statistician Hans Rosling, the main criterion to limit population growth is a reduction of the child mortality rate (see also his Ted Talk on the topic and the stats below). Child mortality rate vs Country population growth rate (including migration) in 2011, Each bubble is a country, bubble color ...


3

It has already been stated that population growth decreases in countries that experience an increase in prosperity. It seems clear to me that this goes hand-in-hand with access to education for all members of the population. To encourage a decrease in number of births per woman in the developing countries, it would seem that the primary goal would be to keep ...


2

Fight to poverty. In fact this is the main goal of the UN agency for sustainable development. People living in poor countries use to have more children because they need somebody to take care of them when they'll be old and they rely on their family and cluster to help eachother. It's too easy to thingk that they don't do contraception because of their ...


2

On first thought I was tempted to say yes, because you are creating a longer-living carbon sink for part of the wood (compared to letting the tree die naturally). But on second consideration: Look at the amount of material that gets discarded when making wooden objects. I estimate that's easily 70% of the tree: 30% in the construction phase alone, plus ...


2

What those countries has in common are non-existant infrastructure like banking system, electricity and sewage. So comfort in everyday life is not there. A good car delivers instant gratification. It is more affordable than a house, has air conditioning and temporary isolation from the atmosphere. A terrible long term solution, but a great one for the ...


2

If you restore the ecology of barren earth so that it continues to sustain and increase total biomass, then you've made a big step in that direction. As soil improves, the total carbon contained or sequestered in it will rise. When a tree dies, or when it is thinned, trimmed, or pruned, the wood can be converted to biochar and most of the carbon removed from ...


2

Even though I agree with most of the previous answers that education and economic equality would be the most efficient mechanics in the long-run, I feel like they do not directly answer your question as it seemed you wanted to have an instrumental answer in the style of IF-THEN. Given the fact that a multidimensional problem such as over-population ...


2

I have trouble finding that list as well. I know that in the past 19 countries already pledged to be carbon neutral by 2050 (see https://www.carbon-neutrality.global/members/). I did also find this UN Climate Action Summit summary page where it says: Five new countries (Austria, Chile, Italy, Japan, Timor-Leste) joined the Carbon Neutrality Coalition ...


2

The pure maths in your question. Trees both absorb and emit CO2. The difference is stocked in wood. You should not see those 2 figures (CO2 cycle and stocked carbon) as 2 different inputs, they're the same. But one is yearly, and the other one over the tree's lifespan, which varies a lot. I'll go with the yearly approach. According to that link trees - I ...


2

Wind turbines and solar panels are not precision measurement instruments. They are instruments to create electricity. So, the answer in general is no, but there may be some validity in the idea for at least offshore wind (but however, the measurement instruments need to be separately installed to the platforms). Let's take a look at how weather is measured ...


2

If every citizen in the world had an average carbon footprint of 16.1 Mg (1 Mg = 1 metric ton) per year, the global average temperature would likely rise more than 6.0º C by 2050. However, there are some important caveats to this answer which I will detail below. Per capita vs. Globalization The question you stated might be slightly different from the ...


1

I'm not a demographer, but I attempted a first order approximation based on what I could find. World-O-Meter has a page with world age structure grouped into buckets of 5 years (eg. 20-24). I roughly calculated the total population over the next 100 years by assuming everyone survives until about age 100, so I just zero out one bucket every 5 years. Annual ...


1

Where I live, forests reach a density of 100-200 cubic meters of growing stock per hectare. One cubic meter equals one tonne of carbon dioxide. From 1870 to 2014, cumulative carbon emissions totaled about 545 GtC. This is about 2000 GtCO2. So, you need 10-20 gigahectares of land. It is 100-200 million square kilometers. Unfortunately, world forest area is ...


1

As a guide, mature sitka spruce forest in the UK has 500m3 of wood per hectare report; This wood has a density of 450 kg/m3 density tables, to that makes 225 tonnes of wood per hectare. The wood is about 50% carbon, so that would convert to 110 tonnes of coal per hectare (the carbon content for wood is discussed by Lamlon in Biomass and Energy). This ...


1

I don't think this question can have a very definite answer because of the enormous time involved. It takes time for mountains to break up into chemical rich dust, and it is really only on land that has risen out of the sea that things could start to grow at first. There may have been enormous tracts of desert for many eons, with plants gradually spreading ...


1

Every tree creates a micro-climate. It provides shelter in winter, shade in summer, protection from the wind... These are mitigating factors that make a house a little warmer, the garden a little more productive, the self-seeding of other trees more likely. It results in positive, accumulative and inter-related effects.


1

I don't know about CCS, sequestration never seems to get close to scaling up for a reasonable cost. (A flagship “clean coal” plant is a flailing mess.) Carbon-capture, however, might have a new price ceiling set: CBC.ca: carbon from air to fuel, but also Vox.com: Sucking carbon out of the air won’t solve climate change, but it might fill in a few key pieces ...


1

People world-wide like status. I return to the South Pacific I take WalMart bags from America. The ladies love to go to town with them. It means someone in our family is rich enough to go there or our friend can go there. Same with the big cell phone. A vehicle says I can out run you, ford deeper rivers and climb up the side of a mountain faster to get away ...


1

Increase broadcast coverage of television soap operas From the abstract of a research paper titled "Soap Operas and Fertility: Evidence from Brazil" (pdf): We estimate the effect of television on fertility in Brazil, where soap operas portray small families. We exploit differences in the timing of entry into different markets of Globo, the main novela ...


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