In the super long run, what would happen if people didn't burn fossil fuels? - Page 3 - Politics Forum.org | PoFo

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Pollution, global warming, urbanisation etc.
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#15027914
Pants-of-dog wrote:@Julian658

Your source says that the Earth is greener than it was twenty years ago, and that this is due to forestation projects and agriculture.

It does not say that the Earth is greener since we have started burning fossil fuels and that this use of fossil fuels is the cause of the rise in foliage.


Sure, it is multifactorial. However, you obviously did not learn basic plant biology in grade school.

Green leaves use energy from sunlight through photosynthesis to chemically combine carbon dioxide drawn in from the air with water and nutrients tapped from the ground to produce sugars, which are the main source of food, fiber and fuel for life on Earth. Studies have shown that increased concentrations of carbon dioxide increase photosynthesis, spurring plant growth.

However, carbon dioxide fertilization isn’t the only cause of increased plant growth—nitrogen, land cover change and climate change by way of global temperature, precipitation and sunlight changes all contribute to the greening effect. To determine the extent of carbon dioxide’s contribution, researchers ran the data for carbon dioxide and each of the other variables in isolation through several computer models that mimic the plant growth observed in the satellite data.

https://www.nasa.gov/feature/goddard/20 ... ning-earth
#15027971
Julian658 wrote:Sure, it is multifactorial. However, you obviously did not learn basic plant biology in grade school.

Green leaves use energy from sunlight through photosynthesis to chemically combine carbon dioxide drawn in from the air with water and nutrients tapped from the ground to produce sugars, which are the main source of food, fiber and fuel for life on Earth. Studies have shown that increased concentrations of carbon dioxide increase photosynthesis, spurring plant growth.

However, carbon dioxide fertilization isn’t the only cause of increased plant growth—nitrogen, land cover change and climate change by way of global temperature, precipitation and sunlight changes all contribute to the greening effect. To determine the extent of carbon dioxide’s contribution, researchers ran the data for carbon dioxide and each of the other variables in isolation through several computer models that mimic the plant growth observed in the satellite data.

https://www.nasa.gov/feature/goddard/20 ... ning-earth


Here is a question you may have been asked in your third grade science class:

If a plant needs 1 litre of water, 1 kilogram of co2, and 1 kilogram of soil nutrients to grow 1 kilogram, how much will the plant grow if it has 1 litre of water, 1 kilogram of soil nutrients, and 2 kilos of co2?
#15027996
Pants-of-dog wrote:Here is a question you may have been asked in your third grade science class:

If a plant needs 1 litre of water, 1 kilogram of co2, and 1 kilogram of soil nutrients to grow 1 kilogram, how much will the plant grow if it has 1 litre of water, 1 kilogram of soil nutrients, and 2 kilos of co2?


Your ignorance shows once again. Do not try to play with hard science if you are just a liberal arts type.
A kilo of CO2 and two kilos of CO2 may have the same concentration of CO2.
Try again. :lol:
Last edited by Julian658 on 20 Aug 2019 17:48, edited 1 time in total.
#15027998
@Julian658

If you wish, I can rephrase the question.

If a plant needs 1 litre of water, a concentration of co2 at 1 ppm, and 1 kilogram of soil nutrients to grow 1 kilogram, how much will the plant grow if it has 1 litre of water, 1 kilogram of soil nutrients, and 2 ppm of co2?
#15028003
Pants-of-dog wrote:@Julian658

If you wish, I can rephrase the question.

If a plant needs 1 litre of water, a concentration of co2 at 1 ppm, and 1 kilogram of soil nutrients to grow 1 kilogram, how much will the plant grow if it has 1 litre of water, 1 kilogram of soil nutrients, and 2 ppm of co2?

The difference between 1ppm and 2ppm is negligible.
#15028007
@Pants-of-dog
The implication you want to draw depends on water or soil nutrients being the limiting factor. It may be that CO2 is the limiting factor though in which case more CO2 would give more growth even with no change water or nutrients. Given that atmospheric CO2 is at record lows on the geological time scale that is a pretty likely situation.
Last edited by SolarCross on 20 Aug 2019 18:07, edited 1 time in total.
#15028042
Pants-of-dog wrote:So, we agree that merely increasing the amount of co2 does not necessarily increase plant biomass.


POD

Talk to your programmer. I understand your code directs you to never concede a point, but that is counterproductive. If you or anyone else makes a statement that is valid I have no problems in admitting I learned something new. BTW, you must also ask your programmer to write new code as to when to ask for citations.

How to Use CO2 to Increase Yields in Your Marijuana Grow
#15028044
Julian658 wrote:POD

Talk to your programmer. I understand your code directs you to never concede a point, but that is counterproductive. If you or anyone else makes a statement that is valid I have no problems in admitting I learned something new. BTW, you must also ask your programmer to write new code as to when to ask for citations.

How to Use CO2 to Increase Yields in Your Marijuana Grow


You certainly react emotionally sometimes.

Anyway, CO2 increases will only result in plant increases if CO2 is the limiting factor.

And the increases in plant cover that we do see are a result if reforestation and agriculture, not CO2 increases.
#15028075
Pants-of-dog wrote:If a plant needs 1 litre of water, 1 kilogram of co2, and 1 kilogram of soil nutrients to grow 1 kilogram, how much will the plant grow if it has 1 litre of water, 1 kilogram of soil nutrients, and 2 kilos of co2?

That will depend on the plant's water content. A very watery plant like iceberg lettuce or watermelon vine might grown a little more than 1kg, while a very dry plant like a pine tree or date palm might grow nearly 2kg.
Pants-of-dog wrote:Anyway, CO2 increases will only result in plant increases if CO2 is the limiting factor.

No, it's more complex than that because increased CO2 reduces plants' water requirements, but the size of the effect depends on temperature and humidity.
And the increases in plant cover that we do see are a result if reforestation and agriculture, not CO2 increases.

No, the shrinkage of deserts caused by increased CO2 is not due to reforestation or agriculture, because it's the other way around: reforestation and agriculture become possible as deserts shrink due to rising CO2 because of CO2's water-sparing effect.
#15028085
Pants-of-dog wrote:@Truth To Power

As far as I can tell, you have no argument.

Facts that support a proposition are arguments.
You have a few unsupported criticisms, and you have not shown how they relate to the original claim.

They are indisputable facts, not unsupported criticisms, and their logical relation to the original claim is obvious even to you. What's really not an argument is responding to an argument with a false claim that it was not stated.
#15028169
Truth To Power wrote:That will depend on the plant's water content. A very watery plant like iceberg lettuce or watermelon vine might grown a little more than 1kg, while a very dry plant like a pine tree or date palm might grow nearly 2kg.

No, it's more complex than that because increased CO2 reduces plants' water requirements, but the size of the effect depends on temperature and humidity.


No. The answer is one kilo.

See my previous link about Liebig’s law.

No, the shrinkage of deserts caused by increased CO2 is not due to reforestation or agriculture, because it's the other way around: reforestation and agriculture become possible as deserts shrink due to rising CO2 because of CO2's water-sparing effect.


No, read @Julian658‘s link.

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