From: peterxpercival@hotmail.com
R Kym Horsell wrote:
> Peter Percival wrote:
>> One hears about the degree to which airlines, shipping, cattle
>> farming,... are contributing to greenhouse gases and thus to global
>> warming. How much do humans contribute by exhaling?
>
> Carbon comes in several forms call "isotopes".
> Some isotopes indicate the carbon has come from underground and
> out of contact with the environment for millions of years.
> Some isotopes indicate they have come from a biological source
> recently.
>
> Scientists can look at the carbon in CO2 and determine that the
> extra carbon dioxide in the atmosphere that has accumulated significantly
> since the 1850s (roughly 1600 Gt) is almost all from a source that was
> biological yet out of contact with the enviornment for millions of years.
>
> Moreover the amount of extra CO2 in the atm roughly corresponds
> with about 1/2 the total coal and oil burned in the past 150 years.
> The other 1/2 has apparently ended up in the oceans where it has
> decreased the pH by around .3 points.
>
> Google and highschool science is your friend.
It maybe that my question was not clearly worded. My apologies if
that's so. I'll try again. One hears that cattle farming, for example,
puts so many tonnes of CO_2 into the atmosphere annually. Or it may be
that cattle contribute such-and-such a percentage of all emissions.
What I'm asking for is the numbers for humans: so many tonnes per annum
or such such-and-such a percentage of all emissions. Get it?
> --
> [From The Archives:]
> Michael Flammer ? @Jumpsteady 03 Dec 2019 23:31Z
> August 1912. This article is from a New Zealand newspaper and can be
> found in the National Library of NZ. It says that the world was
> emitting about 7Gt of CO2 annually which would raise global temperature
> due to the greenhouse effect. I wish all modern newspapers were that
> clear. pic.twitter.com/7gv0iIamC8
>
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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