Martina Kavan
@martinakavan.bsky.social
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Thinking about heat pumps, energy and decarbonisation at
@nestauk.bsky.social
This week's big win 🎉 of the International Court of Justice ruling could change the way states approach NDCs. What did ICJ say? ⚖️ States are obligated to protect the climate under international law ⚖️ They must adopt ambitions NDCs ⚖️ Failure to do so can trigger reparations to affected countries
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Nations who fail to curb fossil fuels could be ordered to pay reparations, top UN court rules
Landmark opinion says those that fail to prevent climate harm could be liable for compensation and restitution
https://www.theguardian.com/environment/2025/jul/23/healthy-environment-is-a-human-right-top-un-court-rules
2 months ago
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Andrew Sissons
4 months ago
There's been a lot of talk about Labour's £13.2bn Warm Homes Plan, which may or may not be confirmed in the spending review tomorrow. But what is the £13.2bn for? My colleagues
@tomleach.bsky.social
and
@martinakavan.bsky.social
have written a nice explainer...
www.nesta.org.uk/blog/what-co...
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What could £13.2 billion do to improve British homes?
As the Spending Review approaches, we analyse Labour's £13.2 billion Warm Homes Plan. While the pledge may survive, what will it take to make it a success?
https://www.nesta.org.uk/blog/what-could-132-billion-do-to-improve-british-homes/
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We've just published our work on reforming energy levies. Current levies inflate electricity bills by ~20%, and favor fossil fuels over clean energy. We project impacts of levy reform on a range of households and show that it's possible to make them both fairer and more climate friendly.
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How to make electricity cheaper
Reforming the levies on energy bills
https://www.nesta.org.uk/report/how-to-make-electricity-cheaper/
4 months ago
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I wrote a blog on the role of electricity prices in helping people in fuel poverty. These are two illustrative scenarios I used to describe the long-term effects of cheap/expensive electricity on public spending and fuel poverty: 🧵
4 months ago
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Jan Rosenow
5 months ago
What if we had no electricity and everything ran on fossil fuels? This ad keeps making me chuckle. Enjoy if you have not seen it or rewatch as it is just gold!
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Moving levies from electricity to gas would protect decarbonisation efforts from volatility in gas prices. 📉 This chart shows the future electricity-to-gas price ratio (key metric for incentivizing electrification) under wholesale price scenarios with (full lines) and without (dashed) rebalancing.
5 months ago
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Fixing electricity pricing is urgent. Without it, decarbonisation stalls and gov will need to spend billions more on subsidies. I wrote a blog explaining the role of energy levies in the total cost of heat pumps. 🧵🔽 This chart shows the projected annual costs over 15 years under status quo:
5 months ago
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Thank you to all reporters who call out anti net zero bullshit. A great cheat sheet for the likes of "UK is only responsible for 1% of global emissions and so can slow down". ("A
@carbonbrief.org
analysis in 2021 found that the UK was the eighth largest country in terms of cumulative emissions.")
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Factcheck: Kemi Badenoch’s claim that net zero is ‘impossible’ by 2050
Tory leader provides no evidence to support position that flies in face of expert reports and her own words
https://www.theguardian.com/politics/2025/mar/19/factcheck-kemi-badenoch-conservative-leader-claim-that-net-zero-is-impossible-by-2050
6 months ago
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The U.S. Department of Defense is ending all of its funding for social science research, stopping 91 ongoing studies related to threats such as climate change, extremism, and disinformation. Oh, this will age so, so badly: "The DOD does not do climate change crap. We do training and warfighting."
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Pentagon abruptly ends all funding for social science research
More than 90 studies on threats such as climate change, extremism, and disinformation are halted
https://www.science.org/content/article/pentagon-abruptly-ends-all-funding-social-science-research
7 months ago
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A nice clear and simple piece from
@energy-uk.org.uk
: "How to cut bills". Doing nothing on energy bills now means: - continued levels of fuel poverty - slow decarbonisation because of expensive electricity - households exposed to more gas price shocks
7 months ago
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reposted by
Martina Kavan
Andrew Sissons
7 months ago
I've got a new Nesta blog up: What does the Seventh Carbon Budget tell us about decarbonising home heating? I've made* a load of charts for it too... (*ok, actually mainly stolen them from the CCC)
www.nesta.org.uk/blog/the-sev...
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What does the Seventh Carbon Budget tell us about decarbonising home heating?
The future of home heating will be electric, and we need to move towards that future quickly
https://www.nesta.org.uk/blog/the-seventh-carbon-budget-on-decarbonising-home-heating/
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Fresh out the CCC oven – the Seventh Carbon Budget sets out a new trajectory for heat pumps. The new Balanced Pathway pushes back heat pump installations into the 30s – more realistic given current progress, but still ambitious.
7 months ago
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Martina Kavan
Andrew Sissons
8 months ago
I generally like David Gauke's writing, but this is really poor on energy prices and net zero I'm afraid. Not going to rebut the whole thing, but a couple of quick points...
www.newstatesman.com/politics/uk-...
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Martina Kavan
Nesta
10 months ago
On the 12 days of Christmas, my heat pump gave to me: 🦃 Enough energy to roast 2,900 turkeys 🥦 5 tonnes of brussels sprouts cooked to perfection 🍮 1,500 gallons of custard warmed and ready-to-eat 🎁 Let's unwrap the numbers on heat pump savings over Christmas ⬇️
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We've been thinking about levies on energy bills a lot at
@nestauk.bsky.social
, and looking at what can be done about them to make electricity cheaper. We've just published an analysis by
@mashley.bsky.social
of the effects of levies on different types of households. --> 🧵
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Cheaper electricity, fairer bills
Electricity prices are disproportionately higher compared to gas prices
https://www.nesta.org.uk/report/cheaper-electricity-fairer-bills/
10 months ago
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With all the talk about energy prices, I'm sure you're all asking yourselves how much households other than yours pay for energy. Surely not everyone spends £[insert price cap] a year. Ask no more. Here we explain and chart how things like heating tech, house size and lifestyles affect bills:
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How different households use energy and how much it costs them
How different households use energy and how much it costs them
https://www.nesta.org.uk/how-different-households-use-energy/
10 months ago
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"McKinsey is 'turning huge profits at the expense of the climate and the energy transition, thanks to its lucrative contracts with many of the world’s biggest climate criminals, including BP, Shell and Koch Industries.'" 🤡
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‘Capitalism incarnate’: inside the secret world of McKinsey, the firm hooked on fossil fuels
Interviews and analysis of court documents show how the world’s most prestigious consulting firm quietly helps fuel the climate crisis
https://www.theguardian.com/business/2024/nov/20/mckinsey-fossil-fuels?CMP=Share_iOSApp_Other&utm_source=pocket_shared
10 months ago
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Ofgem announced today a new energy price cap that'll be in effect from January. Here's a helpful explainer for anyone wanting to understand what the energy price cap is – and what our energy bills pay for:
www.nesta.org.uk/report/whats...
10 months ago
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reposted by
Martina Kavan
Andrew Sissons
11 months ago
New
@nestauk.bsky.social
blog by me: the UK's COP29 pledge to reduce emissions 81% by 2035 is great, but we are not going to meet it without much faster action to decarbonise heating
www.nesta.org.uk/blog/cop29-t...
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COP29: The UK can't be a climate leader till it ditches dirty heat
Meeting our climate pledges depends on phasing out domestic gas and oil boilers faster.
https://www.nesta.org.uk/blog/cop29-the-uk-cant-be-a-climate-leader-till-it-ditches-dirty-heat/
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Genuine question, how difficult is it to ban private jets in the UK? And does this government have a view on it? 🙏
www.theguardian.com/world/2024/n...
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‘Used like taxis’: Soaring private jet flights drive up climate-heating emissions
Analysis of 19m flights between 2019 and 2023 reveals 50% rise in emissions, condemned as ‘gratuitous waste’
https://www.theguardian.com/world/2024/nov/07/used-like-taxis-soaring-private-jet-flights-drive-up-climate-heating-emissions
11 months ago
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Martina Kavan
Simon Evans
11 months ago
Reminder: Victory for Trump is likely to all but end global hopes of staying below 1.5C, our analysis found in March
www.carbonbrief.org/...
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