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CO₂ and Other Greenhouse Gas Emissions

ourworldindata.org

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Re: CO₂ and Other Greenhouse Gas Emissions

#21

Post by cblades »

fearai wrote: post #10

the people pushing the green new deal are doomsday Sayers predicting "crisis" in 12 years. they are more religious than some religious people about their science. however their 6000 scientists don't appear to look at satellite imagery, or choose not to: "The world is literally a greener place than it was 20 years ago, and data from NASA satellites has revealed a counterintuitive source for much of this new foliage: C…

Your second bit is a non-sequitur. Climate change is not a simple factor of how many trees there are, and no one claims that to be the case.

Re: CO₂ and Other Greenhouse Gas Emissions

#22

Post by mempko »

fearai wrote: post #10

the people pushing the green new deal are doomsday Sayers predicting "crisis" in 12 years. they are more religious than some religious people about their science. however their 6000 scientists don't appear to look at satellite imagery, or choose not to: "The world is literally a greener place than it was 20 years ago, and data from NASA satellites has revealed a counterintuitive source for much of this new foliage: C…

Of course, it's greener, plants are made from carbon. What you don't realize is that the biosphere puts as much carbon back in the atmosphere from respiration and fire as it puts in. In other words, it's greener but there are also bigger fires. Also, it's greener for now, but temperatures are changing so fast now that likely most plants won't keep up.

Re: CO₂ and Other Greenhouse Gas Emissions

#23

Post by rayiner »

frankbreetz wrote: post #9
rayiner wrote: post #6

Earlier quoted context omitted.

Seeing as how the 1.5C pathways require global emissions to go zero of negative within our lifetimes, yes: https://ourworldindata.org/uploads/2018/04/Greenhouse-gas-em... .

What I don't understand about this is, that we were flat for about three years, and then we went up a little bit. This to me signals that we are close to if not at peak emissions and we should be able to start seeing the downturn at any time. But the chart you are showing has emissions increasing for the next 20 years. Am I oversimplifying or being naive?

We are nowhere near peak emissions. There may be dips here and there (e.g. due to recession). But look what happened to China starting in 2000: https://images.app.goo.gl/F4m9zThoK7Yr9jC66. It added more CO2 than the total output of the US. That’s going to happen to India and Africa over the next few decades as those places develop into middle class economies.

Re: CO₂ and Other Greenhouse Gas Emissions

#24

Post by frankbreetz »

fearai wrote: post #10

the people pushing the green new deal are doomsday Sayers predicting "crisis" in 12 years. they are more religious than some religious people about their science. however their 6000 scientists don't appear to look at satellite imagery, or choose not to: "The world is literally a greener place than it was 20 years ago, and data from NASA satellites has revealed a counterintuitive source for much of this new foliage: C…

From the Article: The researchers point out that the gain in greenness seen around the world and dominated by India and China does not offset the damage from loss of natural vegetation in tropical regions, such as Brazil and Indonesia. The consequences for sustainability and biodiversity in those ecosystems remain.

Re: CO₂ and Other Greenhouse Gas Emissions

#26

Post by coldtea »

minikites wrote: post #19
legitster wrote: post #17

It's super depressing to see the acceleration of coal energy in 2000. Despite the rise of renewables, they haven't even been able to keep up with the rise of coal! And the vast majority of it comes from energy production! Electric cars don't solve the problem if we are switching from high-efficiency gas engines to coal-fired electric.

You mentioned electric cars, but Bitcoin deserves much of the blame: https://www.theguardian.com/technology/2018/jan/17/bitcoin-e... >Bitcoin’s electricity usage is enormous. In November, the power consumed by the entire bitcoin network was estimated to be higher than that of the Republic of Ireland. Since then, its demands have only grown. It’s now on pace to use just over 42TWh of electricity in a year, placing it…

Currencies based on "hard cpu work" should be forbidden for that alone...

Re: CO₂ and Other Greenhouse Gas Emissions

#27

Post by village-idiot »

ralusek wrote: post #25

Climate aside, doesn't the increase of CO2 from 280PPM to 400PPM not have a substantial impact on the respiration of trees and animals? 42% increase of poison to animals has no meaningful impact?

I'm not sure about other animals, but 400ppm is a long way away from toxic for humanity. Poorly ventilated indoor environments can easily hit 1200-1500ppm. You've got to hit 70,000 to 100,000 ppm before you start running the risk of coma and death.

Interestingly some studies indicate that 1200ppm and higher might confer some mild cognitive impairment, even if it's a long way away from fatal. This has been used glibly to explain the poor decisions made in office rooms, but one does wonder what happens to humanity if global emissions make us slightly dumber.

Re: CO₂ and Other Greenhouse Gas Emissions

#28

Post by beatpanda »

fearai wrote: post #10

the people pushing the green new deal are doomsday Sayers predicting "crisis" in 12 years. they are more religious than some religious people about their science. however their 6000 scientists don't appear to look at satellite imagery, or choose not to: "The world is literally a greener place than it was 20 years ago, and data from NASA satellites has revealed a counterintuitive source for much of this new foliage: C…

The "12 years" figure comes from here:

https://www.ipcc.ch/sr15/chapter/summary-for-policy-makers/

> C.1. In model pathways with no or limited overshoot of 1.5°C, global net anthropogenic CO2 emissions decline by about 45% from 2010 levels by 2030 (40–60% interquartile range), reaching net zero around 2050 (2045–2055 interquartile range).

This report came out in late 2018. As of the publishing of this report, in order to keep global average temperature increase under 1.5°C, CO2 emissions must fall to 45% of 2010 levels in 12 years.

There has been a predictable amount of misstating what this report actually says by environmentalists with poor reading comprehension, and a similar amount of bad-faith readings and intentional obfuscation by climate science deniers, but in any case, this is the source of the "12 years" figure that's been going around.

Nobody is "predicting doomsday in 12 years", but you can set your clock by the outpouring of bad faith "I Told You So"s that will occur in October of 2030 when the world has not ended.

Re: CO₂ and Other Greenhouse Gas Emissions

#29

Post by coldtea »

pif wrote: post #14
mikelyons wrote: post #7

Earlier quoted context omitted.

Pragmatically its more a return to old-style living in many ways but will seem radical to groups addicted to modern lifestyles.

Pragmatically, it's a non starter. Global warming is here to stay: better learn to cope with it!

A, don't worry about it. After the first hundred million corpses, tons of measures will be taken, very pragmatically...

Re: CO₂ and Other Greenhouse Gas Emissions

#30

Post by jbattle »

beatpanda wrote: post #28
fearai wrote: post #10

the people pushing the green new deal are doomsday Sayers predicting "crisis" in 12 years. they are more religious than some religious people about their science. however their 6000 scientists don't appear to look at satellite imagery, or choose not to: "The world is literally a greener place than it was 20 years ago, and data from NASA satellites has revealed a counterintuitive source for much of this new foliage: C…

The "12 years" figure comes from here: https://www.ipcc.ch/sr15/chapter/summary-for-policy-makers/ > C.1. In model pathways with no or limited overshoot of 1.5°C, global net anthropogenic CO2 emissions decline by about 45% from 2010 levels by 2030 (40–60% interquartile range), reaching net zero around 2050 (2045–2055 interquartile range). This report came out in late 2018. As of the publishing of this report, in orde…

My prediction: In 2030 the people denying climate change now will say "Of course everyone believed in anthropogenic climate change! It was only some flat-earthers that denied it was happening. Don't blame us! We tried to do something but the lefties wouldn't let us build nuclear power. Its actually all their fault"
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