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Hannah Ritchie Profile picture
@_HannahRitchie
Oct 26, 2021 • 14 tweets • 8 min read • Read on X
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One week to @COP26, so my inbox is full of requests for data, charts, fact checks on CO₂ emissions.

Great that so many journalists are using data to tell these stories.

A thread of @OurWorldInData resources you might find useful. All open-access & free as a public good.

🧵👇 Image
Easiest way to explore the many CO₂ metrics is in our data explorer.

Includes: Cumulative, annual, per capita, trade-adjusted, share of world totals, by fuel, carbon intensity. For every country. Back to 1751.

ourworldindata.org/explorers/co2

Based on data from
@gcarbonproject

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For those that want the raw data to build upon, we provide our complete @OurWorldInData dataset on Greenhouse Gas Emissions on GitHub.

Download in multiple formats. Clear descriptions of the underlying sources. Scripts are published there too.

github.com/owid/co2-data

2/
On our page on CO₂ emissions we provide multiple views of emissions.

For example, cumulative emissions as a treemap:
ourworldindata.org/co2-emissions#…

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Annual CO₂ emissions as a treemap

ourworldindata.org/co2-emissions#…

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Perspectives on how much CO₂ is embedded in traded goods (consumption-based emissions).

ourworldindata.org/co2-emissions#…

5/ ImageImage
We recently published our climate change impacts data explorer where you can explore metrics such as temperature anomalies, sea level rise, ocean heat content, and others.

ourworldindata.org/explorers/clim…

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We have dedicated country profile pages for every country.

Just pick the one you want from the dropdown.

ourworldindata.org/co2-and-other-…

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Decarbonizing energy is crucial to reduce emissions.

We have a data explorer on energy where you can explore energy consumption, electricity by source, energy by source, and how this mix is changing:

ourworldindata.org/explorers/ener…

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Again, if you want to build upon this energy data we have it all as a complete dataset to download from GitHub.

github.com/owid/energy-da…

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Country profiles on energy for every country.

Just select the one you want from the dropdown and find the important metrics on a single page.

ourworldindata.org/energy#energy-…

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An overview of the combined challenge of development and reducing CO2 emissions is given by @MaxCRoser in his article on the World's Energy Problem: ourworldindata.org/worlds-energy-…

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All of our work on @OurWorldInData is provided as a public good.

Please use it for anything you find useful.

12/
Unfortunately not all of the data we need is publicly available. Some is locked behind paywalls (despite being mostly publicly financed).

This is really unacceptable in the lead up to #COP26. We should take this opportunity to change it 👇

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More from @_HannahRitchie

Hannah Ritchie Profile picture
Sep 14, 2023
I've heard several people say that renewables are not driving an "energy transition". It's really just an "energy addition".

This makes it sound like fossil fuels have been business-as-usual, and we've stuck renewables on top.

I think there is a better way of framing this...🧵
In rich countries it really is an "energy transition".

Renewables are replacing fossil fuels in the electricity grid.

And as EVs replace petrol, and heat pumps replace gas (which are in early stages), the broader energy mix will transition too.

1/ Image
In low & middle income countries, energy consumption is growing strongly, so all of the lines are going up.

However, I think "energy addition" is the wrong phrase here. It's more like "fossil energy displacement".

Growth in fossil fuels would be ⬆️⬆️ without renewables.

2/ Image
Read 5 tweets
Hannah Ritchie Profile picture
Jun 4, 2023
Terrible of the @guardian to publish this ill-informed, out-dated article on EVs.

Why does it build so much of its coverage around the climate crisis, then continually publish nonsense articles that undermine real solutions to address it?

theguardian.com/commentisfree/… Image
@guardian Most of the claims in the article are wrong.

You only have to look at the first, on the CO2 emissions of EVs vs. petrol/diesel cars.

Yes, emissions are higher during the production of an EV but this very quickly pays off when you start driving it.

... Image
@guardian Many have covered this in detail:

carbonbrief.org/factcheck-how-…

sustainabilitybynumbers.com/p/ev-fossil-ca…

iea.org/data-and-stati…

Over its life course, the emissions of EVs are lower (how much lower depends on the electricity mix). As the world decarbonises, this will get even better.

...
Read 5 tweets
Hannah Ritchie Profile picture
Mar 29, 2023
What impact have national greenhouse gas emissions had on global warming?

A new paper by @Jones_MattW & team at @gcarbonproject quantifies each country's contribution to global mean surface temperature rise.

I've added this data to @OurWorldInData. Here are some highlights 👇 Image
@Jones_MattW @gcarbonproject @OurWorldInData First, the team calculcates contributions to temperature rise using cumulative emissions of CO2, methane & nitrous oxide since 1850.

They convert this into carbon-dioxide equivalents using the GWP* method.

Includes emissions from fossil sources, agriculture & land use

1/
@Jones_MattW @gcarbonproject @OurWorldInData Here are 5 countries with the largest contributions to global temperature rise.

🇺🇸 USA: 0.28°C
🇨🇳 China: 0.2°C
🇷🇺 Russia: 0.1°C
🇧🇷 Brazil: 0.08°C
🇮🇳 India: 0.08°C

2/ Image
Read 12 tweets
Hannah Ritchie Profile picture
Dec 22, 2022
It's easy to be skeptical that countries are taking little action on climate change.

This isn't true.

Looking at the shift in our trajectory in just a few years tells a different story.

I looked back at the past 6 years of @climateactiontr projections 👇
@climateactiontr 2016.

Policies in place would have taken us to 3.3 to 3.8°C by 2100.

Country pledges to 2.5 to 2.7°C.

1/
@climateactiontr 2017.

National policies: 3.1 to 3.7°C

Country pledges: 2.6 to 3.2°C

2/
Read 11 tweets
Hannah Ritchie Profile picture
Dec 20, 2022
🆕 @f_spooner and I have published a major new redesign of our work on Biodiversity on @OurWorldInData 🐘🦁

A day after the world sealed a new deal on how to limit biodiversity loss & reverse it.

Explore all our data and articles in one place: ourworldindata.org/biodiversity Image
@f_spooner @OurWorldInData This redesign includes a block of Key Insights on the topic 👇

1/ Image
@f_spooner @OurWorldInData A spot where you can find all of our research and writing 👇

2/ Image
Read 4 tweets
Hannah Ritchie Profile picture
Dec 5, 2022
Eating locally is not an effective way to reduce the carbon footprint of your diet.

This is despite a recent paper in @NatureFoodJnl claiming that 'food miles' make up 20% of food emissions.

In my latest Substack post I explain why this is wrong: hannahritchie.substack.com/p/food-miles
@NatureFoodJnl Some of the key points:

The new paper by Li et al. (2021) claimed that 'food miles' were 3.5 to 7.5 times higher than previous studies.

This is only because they redefined 'food miles' (to include things that are definitely not food miles).

1/
@NatureFoodJnl Their own results do not even support 'eating local makes a big difference'

They modelled a scenario where all countries got *all* of their food domestically.

Food emissions were reduced by just 1.7%.

They actually showed the opposite: it was very ineffective...

2/
Read 5 tweets

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