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Hannah Ritchie Profile picture
@_HannahRitchie
Nov 7, 2017 • 5 tweets • 3 min read • Read on X
This week nations meet for #COP23 to discuss global progress on climate change. Lots of data on CO₂ in our entry: ourworldindata.org/co2-and-other-… Image
Reaching global deal on responsibility for emissions reductions & costs of climate change difficult, because several emissions metrics...

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More from @_HannahRitchie

Hannah Ritchie Profile picture
Oct 19, 2023
A 🧵 of books I've read recently, and you might like.

1. Material World by @EdConwaySky.

A great tour of 6 materials that have built the world around us. Some crucial stories for the future energy transition too. Image
2. Blue Machine by @helenczerski

Beautiful journey through the depths of the ocean.

I thought it was going to be all about the human impacts on these ecosystems, but that was only a small chunk near the end.

Understanding the science makes me want to protect them even more. Image
3. Climate Capitalism by @AkshatRathi

I got the joy of reading an advance copy.

"It's now cheaper to save the world than destroy it." 🙌 Image
Read 7 tweets
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

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