4 ms·

What exactly is amusing? Large asteroids have the capability of introducing a sufficient large temporary disturbance of the worlds climate so that an extinction

by _ph_ 3y ago

What exactly is amusing? Large asteroids have the capability of introducing a sufficient large temporary disturbance of the worlds climate so that an extinction cascade might be triggered. It doesn't have to kill every single animal, just to disrupt enough food chains. Which is exactly the worst-case with the current, human caused greenhouse effect.

wheelerof4te 3y ago
[flagged]
- ironSkillet 3y ago
  Nobody disputes that earth's climate changes naturally over time. People are arguing that human behavior (pollution) is causing climate change at a much faster pace than would otherwise occur.
- _ph_ 3y ago
  Of course, as anyone who has a bit of scientific knowledge knows, it isn't a myth. It is an effect on top of the natural climate change caused by raising the CO2 content by 50%, mostly in the last 50 years. This causes a very quick warming at a speed far quicker than natural climate change. It is this speed which makes the climate change so dangerous. Which is where we are back at the asteroids. Beyond the direct impact damage, they cause a sudden climate shift.
- slater 3y ago
  > Human-caused climate change is a myth No, it's not.
- fsloth 3y ago
  “Human-caused climate change is a myth.“ What makes you think exactly the global scientific consensus would be wrong in this matter?
  - steve_adams_86 3y ago
    Space lizards and the new world order, obviously
    - wheelerof4te 3y ago
      Close. I'm more of a believer that ancient civilizations existed some time in the Earth's past. But, I digress.
      - fsloth 3y ago
        In general the argument for man-made global warming is composed of 1) Humans have increased the carbondioxide content of atmosphere 2)Atmosphere with more CO2 stores more heat 3) Storing more heat results in rise in global temperaturea All of which are points the scientific community agrees. So you don’t in fact refute any of the above?
  - deleted 3y ago
    [deleted]
- tzs 3y ago
  So what do you think scientists got wrong? 1. That CO2 is not transparent to infrared light? 2. That CO2 is transparent to visible light? 3. That things heated by visible light radiate much of that heat back as infrared light? 4. That CO2 levels in the atmosphere are rapidly rising? 5. That raising CO2 levels will cause warming (see #1, #2, #3)? 6. That there are different isotopes of carbon, with different half lives? 7. That living things regularly exchange carbon with atmospheric carbon? 8. That because of that exchange the isotope ratios in carbon from living things matches the atmosphere carbon isotope ratios? 9. That when living things die they stop breathing? 10. That because of #6-10 we can tell from isotope ratios how long ago something died? 11. That as the CO2 levels have risen dramatically over the last couple hundred years, the isotope ratios of atmospheric carbon have changed? 12. That from these ratios we can tell that most of the increase in CO2 comes from sources that have not been exchanging carbon with the atmosphere for a very long time? 13. That fossil fuels come from long dead things, and have isotope ratios that match whatever provided most of that increased atmospheric CO2? 14. That the amount of CO2 that we are putting in the atmosphere from burning fossil fuels matches up closely with the amount of extra carbon we know must have come from sources that have not exchanged carbon with the atmosphere for a long time? 15. That we have satellites that can measure incoming and outgoing radiation and see that we are out of equilibrium, by an amount that fits with the amount that we would expect from that extra CO2?
  - wheelerof4te 3y ago
    If the climate change is caused by humans, that is more likely due to deforestation and destruction to nature. CO2 is used by plants, and plants produce oxygen. If you kill more plants and build concrete cities over where they were...you could get your global warming.
    - tzs 3y ago
      Deforestation and destruction of nature could change CO2 levels, but they don't change the isotope mix of the carbon in atmospheric CO2. We know the increase is mostly coming from something whose carbon has a different isotope mix.
- steve_adams_86 3y ago
  You’re right that it always changes, but we don’t have record of it changing this quickly without it being caused by some traumatic geological event or something. We’re trending warmer way, way faster than evidence shows we normally do.

by _ph_ 3y ago

wheelerof4te 3y ago

[flagged]

ironSkillet 3y ago
Nobody disputes that earth's climate changes naturally over time. People are arguing that human behavior (pollution) is causing climate change at a much faster pace than would otherwise occur.
_ph_ 3y ago
Of course, as anyone who has a bit of scientific knowledge knows, it isn't a myth. It is an effect on top of the natural climate change caused by raising the CO2 content by 50%, mostly in the last 50 years. This causes a very quick warming at a speed far quicker than natural climate change. It is this speed which makes the climate change so dangerous. Which is where we are back at the asteroids. Beyond the direct impact damage, they cause a sudden climate shift.
slater 3y ago
> Human-caused climate change is a myth No, it's not.
fsloth 3y ago
“Human-caused climate change is a myth.“ What makes you think exactly the global scientific consensus would be wrong in this matter?
- steve_adams_86 3y ago
  Space lizards and the new world order, obviously
  - wheelerof4te 3y ago
    Close. I'm more of a believer that ancient civilizations existed some time in the Earth's past. But, I digress.
    - fsloth 3y ago
      In general the argument for man-made global warming is composed of 1) Humans have increased the carbondioxide content of atmosphere 2)Atmosphere with more CO2 stores more heat 3) Storing more heat results in rise in global temperaturea All of which are points the scientific community agrees. So you don’t in fact refute any of the above?
- deleted 3y ago
  [deleted]
tzs 3y ago
So what do you think scientists got wrong? 1. That CO2 is not transparent to infrared light? 2. That CO2 is transparent to visible light? 3. That things heated by visible light radiate much of that heat back as infrared light? 4. That CO2 levels in the atmosphere are rapidly rising? 5. That raising CO2 levels will cause warming (see #1, #2, #3)? 6. That there are different isotopes of carbon, with different half lives? 7. That living things regularly exchange carbon with atmospheric carbon? 8. That because of that exchange the isotope ratios in carbon from living things matches the atmosphere carbon isotope ratios? 9. That when living things die they stop breathing? 10. That because of #6-10 we can tell from isotope ratios how long ago something died? 11. That as the CO2 levels have risen dramatically over the last couple hundred years, the isotope ratios of atmospheric carbon have changed? 12. That from these ratios we can tell that most of the increase in CO2 comes from sources that have not been exchanging carbon with the atmosphere for a very long time? 13. That fossil fuels come from long dead things, and have isotope ratios that match whatever provided most of that increased atmospheric CO2? 14. That the amount of CO2 that we are putting in the atmosphere from burning fossil fuels matches up closely with the amount of extra carbon we know must have come from sources that have not exchanged carbon with the atmosphere for a long time? 15. That we have satellites that can measure incoming and outgoing radiation and see that we are out of equilibrium, by an amount that fits with the amount that we would expect from that extra CO2?
- wheelerof4te 3y ago
  If the climate change is caused by humans, that is more likely due to deforestation and destruction to nature. CO2 is used by plants, and plants produce oxygen. If you kill more plants and build concrete cities over where they were...you could get your global warming.
  - tzs 3y ago
    Deforestation and destruction of nature could change CO2 levels, but they don't change the isotope mix of the carbon in atmospheric CO2. We know the increase is mostly coming from something whose carbon has a different isotope mix.
steve_adams_86 3y ago
You’re right that it always changes, but we don’t have record of it changing this quickly without it being caused by some traumatic geological event or something. We’re trending warmer way, way faster than evidence shows we normally do.