Well that thread certainly took off.

Lots of questions about ventilation, what monitor I used, and what you should do if you have a gas stove.

So here's... another thread 🧡

First, let's talk ventilation (i.e. range hoods, fans, etc).

The most common question I got was: "If I use my range hood am I safe?"

Yes and no.
All cooking -- whether you use gas or electric -- produces PM2.5 pollution.

Basically when you cook food, little particles that are smaller than a human hair start flying around your kitchen.

That stuff isn't good to breathe.
Using a proper range hood -- a powerful one that vents to the outside -- reduces PM2.5 levels.

And it'll work even better if you use the back burners.

So if you have a hood that vents to the outside, use it.
But here's where things get a bit complicated.

Cooking with gas is different than cooking with electricity in that it produces NO2.

That's the stuff that causes respiratory illnesses like asthma.
In 2014 a group of researchers ran side by side tests in 100 homes.

They split them up into 3 groups:

Group 1 had their gas stove replaced with an electric one. Group 2 had a HEPA and carbon filter installed. And Group 3 got a new range hood.
So what did they find?

Switching to electric was by far the most successful intervention. It reduced household NO2 levels by 50%.

The air filter was the next most effective. It cut NO2 by 20%.

The range hood didn't do anything to reduce NO2.
You can read the full peer-reviewed paper here - ncbi.nlm.nih.gov/pmc/articles/P…

But the takeaway is this:

The most effective thing we can do to improve indoor air pollution is stop installing gas.
That's not to say we shouldn't use ventilation.

Again, PM2.5 is caused by all cooking. And range hoods help reduce that stuff.

But we can't pretend that installing gas stoves w/ ventilation is a good solution.
The second most common question I got was: "What air monitor did you use?"

I used the @uhooair

It's one of the rare consumer-grade (i.e. not crazy expensive) options that measures N02.
If you're looking for a professional-grade monitor, this is what @jlashk recommended to me - aeroqual.com/products/s-ser…

But it's not cheap ($1,000+).
And lastly, a lot of people asked "Should I ditch my gas stove?"

This one is tricky.

As I wrote in the full length article, my wife and I are still deciding what we should do.

We just moved into our house and aren't sure how long we want to stay.
We're planning to make a decision in the next few months.

In the meantime, we try to open windows as much as we can when we cook.

We also put a HEPA and carbon filter in our kitchen based on the research cited above that shows that reduces NO2 by 20%.
But ultimately everyone's risk tolerance and priorities are different.

All I can do is share the research and data. My hope is that will help people make informed decisions.
One thing is clear though:

As a matter of public policy, we need to stop allowing gas and other fossil fuels in new construction.

And we can all do something about that.
So my main recommendation is this:

Get involved politically. Show up to your city council meetings and ask about building code.

Elect leaders who take climate and health seriously.

There's so much we can all do. Let's get started!

β€’ β€’ β€’

Missing some Tweet in this thread? You can try to force a refresh

Keep Current with Michael Thomas

Michael Thomas Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!


Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @curious_founder

13 Jan
Over the last two months I've read dozens of studies about gas stoves and indoor air quality.

I also installed monitors in our home and ran my own tests.

Here's a thread on what I learned 🧡 #energytwitter
First, I should admit that I was skeptical about the panic over gas stoves at first.

As a climate hawk, I was focused on the emissions.

Gas stoves are responsible for 0.12% of emissions in America. I felt like we should focus on the bigger stuff (furnaces and water heaters).
But then I learned about the negative health impacts of gas stoves.

Researchers have been studying this stuff for decades. And every year, it becomes more clear:

Gas stoves produce unsafe levels of nitrogen dioxide (NO2). And that causes respiratory illnesses like asthma.
Read 15 tweets
23 Dec 21
3 years ago I started my company, Campfire Labs, and pledged 50% of the profits to climate advocacy.

Today I just sent ~$200,000 worth of grants bringing our total giving for the year to ~$300,000.


Here are some of the orgs we gave money to this year 🧡
.@theclimatevote for grassroots climate organizing and making effective climate action easy.

Here's a thread on why I love what they're doing:
.@rewiringamerica for developing and lobbying for federal policy to #electrifyeverything

@GriffithSaul and the Rewiring team have brought a ton of people into the climate movement by creating a new story that is more motivating than the old sacrifice narrative.
Read 8 tweets
30 Nov 21
I analyzed ~65,000 nonprofit tax returns to see where charitable dollars go in America.

I learned that environmental nonprofits receive less than 2% of all donations.

Here's what else I learned 🧡

#GivingTuesday #energytwitter
In 2020 Americans gave $471 billion to nonprofits.

Most of those donations went to the following categories: religion, education, human services, and health.

Environmental organizations received just $8 billion (~2%) β€” the least amount of any category tracked by the IRS. Image
Organizations working to reduce GHG emissions received only $2 billion.

That means 0.4% of all charitable donations went to climate mitigation.

Which is a huge bummer to say the least.
Read 11 tweets
12 Nov 21
Most banks use your money to fund fossil fuel projects πŸ‘Ž

But some banks use your money to fund #climate solutions like solar β˜€οΈ

I spent dozens of hours over the last few weeks trying to find the best climate-friendly bank.

Here's what I learned 🧡
1. Most banks are still pouring trillions into fossil fuel projects.

Here's how much the top banks have lent since Paris:

@Chase: $316 billion
@Citi: $237 billion
@WellsFargo: $223 billion
@BankofAmerica: $198 billion

Source: @RAN's latest report - ran.org/wp-content/upl…
2. Where you choose to bank has a direct impact on what projects do or don't get funded.

If you bank with @Chase or @WellsFargo, your money funds more oil rigs and coal plants.

If you switch to a sustainable bank, your money funds rooftop solar, wind farms, EVs, etc.
Read 9 tweets
12 Nov 21
AHRI just released the latest data on heating and cooling installs.

353k homeowners installed natural gas furnaces in Sept.

Those installs guarantee ~4m tons of carbon emissions / year for the next 20 years.

That's 80m of carbon budget πŸ”₯ in a single month.

We need to get that number to zero ASAP. But we're trending in the wrong direction.

Here are the gas furnace install numbers for the last three Septembers:

2019: 286,870
2020: 351,087 (weird year)
2021: 353,047

Here they are for the last 2 decades (note: 2021 YTD is up 30%)
Now let's look at air conditioning units ❄️

All a/c runs on electricity. That's good. But most a/c units are really inefficient. That's bad.

So in the short term, installing inefficient units is its own form of fossil-fuel lock-in.
Read 9 tweets
11 Nov 21
Wow, I knew that China burned more coal than any country, but this graph is staggering 🀯
But the US takes the cake on fossil gas emissions
And oil
Read 5 tweets

Did Thread Reader help you today?

Support us! We are indie developers!

This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!


0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy


3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us on Twitter!