13 votes

When will the Earth try to kill us again: Most mass extinctions began with vast convulsions of Earth’s interior—can we detect that?

3 comments

  1. Flashynuff
    Link
    This article discusses giant lava flows in the Earth's past that caused mass extinction events by, guess what, causing enormous quantities of CO2 to be liberated into the atmosphere. It's a great...

    This article discusses giant lava flows in the Earth's past that caused mass extinction events by, guess what, causing enormous quantities of CO2 to be liberated into the atmosphere. It's a great look at the actual geological mechanics behind these events, how scientists have been discovering those mechanics, and how they know that the eruptions and mass extinctions are related.

    While we don't really have to worry about any of these lava flows in our lifetime since they occur on a geologic timescale, I found the last 3 paragraphs troubling:

    Human mining and burning of fossil fuels mimics the most deadly LIPs. Even if LIP greenhouse gas emissions were larger and lasted far longer, our emission rates are far faster, so they are just as capable of overwhelming Earth’s neutralizing mechanisms. This is compounded by a cacophony of other man-made environmental disturbances (pollution, acid rain, deforestation, and so on).

    Climate warming, sea-level rise, ocean acidification, and dead zones are happening now as they did then. It’s simply how the planet works. Earth is responding to us just as it did to LIPs, and it is trying to kill us, now.

    As Andy Ridgwell of UC Riverside told me in 2015, “Apart from the stupid space rock hitting the Earth, most mass extinctions were CO2-driven global warming things. If you screw with the climate enough, you have huge extinctions. The difficulty is how much is enough, and what goes extinct.”

    3 votes
  2. [2]
    hookertime
    Link
    We're definitely on course for bad things to come. I think not acting on our effect on Earth's atmosphere is ignorant, arrogant, and will eventually bite us in the ass. I'm not sure how we go...

    We're definitely on course for bad things to come. I think not acting on our effect on Earth's atmosphere is ignorant, arrogant, and will eventually bite us in the ass. I'm not sure how we go about doing it, either; so much of our world's society is dependent on using things that generate pollution. Mining metals for our phones, using electricity to cool and heat our homes, burning gas to run cars and trucks. It's alarming to see the trends be ignored or erroneously refuted by those in power.

    2 votes
    1. shmikey
      Link Parent
      In terms of energy consumption, I feel that people are at least taking steps in the right direction in terms of wind and solar. And there is research on how to sequester CO2 from the atmosphere...

      In terms of energy consumption, I feel that people are at least taking steps in the right direction in terms of wind and solar. And there is research on how to sequester CO2 from the atmosphere and how to scrub CO2 from factory exhaust using algae. We just need the political will to support these universally beneficial projects and research avenues.

      1 vote