The IPCC says* it’s unequivocal that humans are responsible for global heating and our GHG emissions are responsible for 100% of the recent warming.

Preindustrial atmospheric CO₂ was ~280 ppm and now it’s >420 ppm, so we’re responsible for 33% of what’s in the atmosphere (not 3%).

*When I say “the IPCC says…”, that’s shorthand for “some of the world’s best scientists volunteered years of their time pouring over tons of peer reviewed publications and summarized their conclusions to say…”.

It’s so crazy that climate deniers think humans don’t cause climate change but volcanos eruptions do.

The eruption of Mount St. Helens released ~10 Mt of CO₂ into the atmosphere.

Human activities currently release that amount of CO₂ in ~2 hours.

I will never forgive Elon Musk for making Twitter so terrible that people think LinkedIn is acceptable to use.

The real paleo diet was mostly plant-based. 🌱

#vegetarian

https://www.nature.com/articles/s41559-024-02382-z

I was at a conference and a speaker dismissed my question by saying that I should check out the work of David Ho. 😵💫

For April Fools' Day, I was going to suggest a ridiculous CO₂ removal (#CDR) method but everything I’ve come up with has already been proposed as a real solution.

My summary of nature based carbon offsets: project developers make a lot of money, local communities don’t benefit much, and they don’t do anything for climate.

The news is bad but the data visualization is good.

The sea surface temperature is too damn high.

It’s not: if we don’t decarbonize fast enough, we’ll need more CO₂ removal (#CDR).

It’s: If we don’t decarbonize fast enough, we’re screwed.

CDR is useless unless we decarbonize drastically.

CDR is for residual emissions, not luxury removal.

I’ve got jokes about carbon offsets, but someone’s already proposed them as real climate solutions.

When I hear people say that we should use the ocean for CO₂ removal (CDR) because it's so big, I wanna scream that it's already removing 10,200,000,000 tonnes per year more CO₂ than it did before the industrial revolution!

In case you wondered why fossil fuels need advertising: Hey, oil, gas, and coal aren’t gonna greenwash themselves!

If capitalism is so perfect, why do we have to give so many subsidies to corporations?

Because I needed another reason to never fly on a 737 MAX.

It's super depressing that bad news about climate change is like, "Omg, everything is gonna die," and the good news is like, "In paragraph 28d, COP finally acknowledged that fossil fuels exist."

If direct air removal costs $500 per tonne, removing just US emissions would cost ~$3 trillion annually (that's ~4x US military spending).

It would also require twice the total power generation capacity of the US today (and it has to be carbon-free).

https://thebulletin.org/2023/12/direct-air-capture-an-expensive-dangerous-distraction-from-real-climate-solutions/

What is common knowledge in your field but shocks outsiders?

More than half the CO₂ emissions of the industrial age have been dumped into the atmosphere since 1990.

Anything that makes a city a worse place to drive makes it a better place to live… 👀

https://xkcd.com/2832/