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Dr David Pegg

@planetpegg.bsky.social
1.2K followers 757 following 41 posts

London-based, energy ⚡️, infrastructure🌇, geology lover🤘, Dr of Planets🌋. Gay 🏳️‍🌈, gym 🏋️‍♂️, plant dad🌵, lover of science🧪, dyslexic/dyspraxic, he/him

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Dr David Pegg @planetpegg.bsky.social · 16/05/2025
This is some great news from China: emissions are falling dispite an increase in energy usage, let's hope that the emissions continue to fall! www.carbonbrief.org/china-briefi...
carbonbrief.org
China Briefing 15 May 2025: CO2 emissions fall; Drought affects food production; Climate diplomacy at CELAC  - Carbon Brief
A new survey of Shanxi residents, exploring attitudes to climate change and “just transition”, offers a rare insight into the views of Chinese people on the frontline of the energy transition
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Simon Clark @simonoxfphys.com · 29/03/2025
A dip in solar generation (yellow line) in the UK this morning because of the eclipse!
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Dr Alfredo Carpineti @drcarpineti.bsky.social · 27/03/2025
So ready for Dracula - A comedy of Terrors with @planetpegg.bsky.social @chrisince.bsky.social and @raidercast.bsky.social Had to disappoint Chris that the Mernier Chocolate Factory is not a working chocolate factory/ theatre!
A poster of Dracula a comedy of terrors outside on the street. Dracula and Jonathan Harker in the broadway version. Dracula is doing almost a plank over the bench harker looking very hot
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Dr David Pegg @planetpegg.bsky.social · 21/02/2025
Today, at the #NIC we published the results of our study of electricity distribution networks. nic.org.uk/studies-repo... Distribution networks deliver electricity to people's homes and most businesses.
nic.org.uk
Electricity distribution networks: Creating capacity for the future - NIC
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Ketan Joshi @ketanjoshi.co · 13/02/2025
Please enjoy this hydrogen fuel cell bicycle in Shell's energy scenarios report (from 2001) www.shell.com/news-and-ins...
just a horrific bicycle with a huge hydrogn container on the back
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Dr. Simon D. A. Clark (they/them) @kelpiesi.bsky.social · 05/02/2025
It's LGBTQ+ history month. Myself, & other LGBTQ+ folk in STEM, work to improve inclusivity. But why is this needed? The recent dismantling of inclusion initiatives, & the rise of anti-LGBTQ+ governments, it's important to reflect on why we do this 🏳️‍🌈👇🧵 #LGBTHistoryMonth #LGBTinSTEM #LGBTQinSTEM
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Our World in Data @ourworldindata.org · 28/01/2025
The world has probably passed “peak air pollution”
The image shows a series of six line graphs depicting the trends in global emissions of different pollutants from 1750 to 2022. The title reads "The world has passed 'peak pollution'," indicating that emissions of several pollutants have declined since their peak levels, except for ammonia.

The pollutants shown are:

- Sulphur dioxide (SO₂) – peaked in the mid-20th century and has since declined.
- Nitrogen oxide (NOx) – followed a similar pattern, peaking around the late 20th century and then dropping.
- Carbon monoxide (CO) – peaked mid-20th century and declined.
- Black carbon (BC) – shows a rise until recently, followed by a drop.
- Organic carbon (OC) – has risen steadily with a recent plateau.
- Ammonia (NH₃) – continues to rise without a recent decline.
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Dr David Pegg @planetpegg.bsky.social · 21/01/2025
I've not used twitter for ages now but does anyone have any advice on how to bulk delete my content on there?
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Dr Alfredo Carpineti @drcarpineti.bsky.social · 11/01/2025
Trek Movie double bill: VI & I with @planetpegg.bsky.social & @raidercast.bsky.social
Photo of the tv with the menu screen from Star Trek vi the undiscovered country
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UK Space Agency @ukspaceagency.bsky.social · 09/01/2025
Check out these new images from the European/Japanese #BepiColombo mission on its final Mercury flyby. 👇 The spacecraft, with UK-built instruments, will increase our understanding of Mercury's composition, structure, and atmosphere. 🌕 Learn more 👉 gov.uk/government/c... 📷 ESA/BepiColombo/MTM
Part of spacecraft with Mercury close in background.Part of spacecraft with Mercury close in background.Part of spacecraft with Mercury in background.
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Dr Alfredo Carpineti @drcarpineti.bsky.social · 01/01/2025
Lovely new year gathering @raidercast.bsky.social @planetpegg.bsky.social @geckokid.bsky.social @pokubakes.com ✨🥂
The seven of us on the roof with London in the background A puff pastry twisted rounded with melted Camembert in the middle Me, Jackie, Craig and David taking a selfie Me, Chris and Brad taking a selfie on the sofa
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รℓσαɳε ℓყรɓεƭɦ @sloanelysbeth.northsky.social · 22/12/2024
sandi toksvig is the national treasure ppl like to think stephen fry is.
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Paul Byrne @theplanetaryguy.com · 20/12/2024
This is what it looked like when we punched an asteroid back in 2018. For science. For the dinosaurs.
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Dr Alfredo Carpineti @drcarpineti.bsky.social · 01/12/2024
In our Star Trek movies rewatch we got to this. @planetpegg.bsky.social @raidercast.bsky.social
A picture of our tv showing the menu of paramount plus to watch Star Trek V: the final frontier
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Jess Ralston @jessralston.bsky.social · 28/11/2024
*NEW* heat pump installs reached a new record in October, under the Government's Boiler Upgrade Scheme 3,800 applications received in October ‼️ following a year of growth after the last Government upped the grant amount to £7,500
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ECIU @eciu.net · 25/11/2024
Want to ‘buy 🇬🇧 British’ energy for for heating? By 2030, w/ renewable roll outs, heat pumps will use: 📍 55% LESS imported energy than today 📍 1/6 the imported energy of a gas boiler 🧵
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Dr David Pegg @planetpegg.bsky.social · 25/11/2024
Today, thanks to BUUK, I got to visit a wonderful zero carbon heat network in Suffolk. It will supply a new build suburban housing estate with heat and instant hot water from an air source heat pump. It even had a thermal store to help reduce electricity demand during peak hours.
Selfies of account owner infront of a wooden wall that says Chilton woods community heat hub
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Andrew Sissons @acjsissons.bsky.social · 22/11/2024
Energy bills are going to rise again in January. But what are we actually paying for in an energy bill? My colleague @martinakavan.bsky.social has written this lovely explainer, with some neat charts www.nesta.org.uk/report/whats...
Stacked bar chart comparing the annual electricity and gas bills of a typical household (£1,717 total). Electricity costs £884, made up of £319 wholesale costs, £212 network costs, £141 policy costs, £122 operating costs, £48 other costs, and £42 VAT. Gas costs £833, made up of £416 wholesale costs, £158 network costs, £46 policy costs, £125 operating costs, £48 other costs, and £40 VAT.
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Dr David Pegg @planetpegg.bsky.social · 21/11/2024
Great news! The government is going to remove the 1m planning application requirement for heat pumps. This rule was putting people off getting a heat pump and makes it much easier for people in terraced houses to install one. www.gov.uk/government/n...
gov.uk
Help to save households money and deliver cleaner heat to homes
Up to 300,000 homes to benefit from upgrades next year, as government continues rollout of the Warm Homes Plan.
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Dr David Pegg @planetpegg.bsky.social · 20/11/2024
Gave the keynote presentation at EMEX 2024 today. 20 minutes to cover the energy infrastructure policy needed to meet net zero was a challenge but the questions show it was worth while!
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Iain Soutar @isoutar.bsky.social · 19/11/2024
Re-upping this for all those who have just joined...
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Pride in STEM @prideinstem.bsky.social · 18/11/2024
November 18 is the International Day of LGBQTIA+ People in STEM! Today more than ever we want to stress the importance of communities, building connections, and raising each other up. Let's keep leaving our mark for the betterment of us all! 🏳️‍⚧️🏳️‍🌈 #QueerinSTEM prideinstem.org/lgbtstemday/
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Energy Networks Association @ena.energy · 16/11/2024
👋 Bringing some energy to BlueSky... #ElectricVibes
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Håkon Nordhagen @hakonnordhagen.bsky.social · 17/11/2024
As @kencaldeira.bsky.social estimates: "each kg of CO₂ ultimately melts about 650 kg of glacial ice." Also a physical reality (with some uncertainty) that adds spice to what Ketan says. kencaldeira.com/2018/03/how-...
kencaldeira.com
How much ice is melted by each carbon dioxide emission? | @KenCaldeira
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Iain Soutar @isoutar.bsky.social · 16/11/2024
Shortcut to some energy starter packs: UK/Europe 1: go.bsky.app/BAxXdHc UK/Europe 2: go.bsky.app/DTY2xx3 Women in energy: go.bsky.app/AGCURBf Community energy: go.bsky.app/LpqEmbM
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Michael Liebreich @mliebreich.bsky.social · 15/11/2024
A message to UK Conservatives: "We should be restating our commitment to net zero 2050 and laying out an inspiring, affordable, job-creating, reality-based programme to get there. If we don’t, we will remain in opposition. And we will deserve to." conservativehome.com/2024/11/15/m...
conservativehome.com
Michael Liebreich: The inconvenient choice for Conservatives is to recommit to net zero or get used to opposition | Conservative Home
We can acknowledge that many became uncomfortable with the costs that net zero seemed set to impose but we must also go back to first principles – as scientists, as engineers, as financiers and as Con...
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The Guardian @theguardian.com · 17/11/2024
The Observer view: the Cop summit is foundering, we need urgent action not more hot air
dlvr.it
The Observer view: the Cop summit is foundering, we need urgent action not more hot air
The grim negotiations in Baku, Azerbaijan, have shown the need for reform of the UN annual global climate talks ‘Global emissions continue to increase, carbon sinks are being degraded and we can no longer exclude the possibility of surpassing 2.9C of…
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Jon Burke🌍 @jonburkeuk.bsky.social · 16/11/2024
Cars in the U.K are up to 55% larger today than they were in the 1970s and there are twice the number of cars on the U.K's roads as there were 30 years ago, but the media are still running articles claiming that a handful of cycle lanes and LTNs 'cause congestion' in London...🙄
A Morris Minor parked next to a huge new SUV.
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Monty Boa @montyboa.bsky.social · 15/11/2024
Both Mercury and Venus have tails, like comets. Mercury's is formed from sodium atoms being blasted free of its 'exosphere' (like an atmosphere, but too thin to behave like gases), and then fluorescing, due to cosmic radiation (like our polar auroras). www.sciencealert.com/the-tail-of-...
sciencealert.com
Mercury Is a Planet With a Tail. Here's How That's Possible
The planets of the Solar System look a lot like a family.
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Andrew Sissons @acjsissons.bsky.social · 15/11/2024
Right - EPC reform! You know those energy performance certificates that you see on Rightmove? They’re terrible, everyone in the energy sector hates them. But actually reforming them is tricky. My colleague @tomleach.bsky.social tries to chart a way forward www.nesta.org.uk/blog/epcs-ne...
nesta.org.uk
EPCs need radical reform - here’s four ways how
The system has become too complicated. It's time to make EPCs useful.
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Dr David Pegg @planetpegg.bsky.social · 13/11/2024
Whenever people talk about how much fossil fuel energy we need to replace with renewables, they often forget how much energy is wasted when burning them.
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Dr David Pegg @planetpegg.bsky.social · 13/11/2024
Alt text is such an easy way of making things more accessible. I'm really glad to see this as a setting and would encourage you to turn it on!
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Thibaut Brunet @thibautbrunet.bsky.social · 11/11/2024
[looking at Bluesky over the past 2 days] So this is what the Cambrian explosion must have felt like
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Andrew Sissons @acjsissons.bsky.social · 12/11/2024
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...
nesta.org.uk
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.
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Jan Rosenow @janrosenow.bsky.social · 12/11/2024
Batteries prices continue to fall. A more than 90% drop over the past 15 years. Innovation and learning curves keep driving battery prices down.
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Dr David Pegg @planetpegg.bsky.social · 12/11/2024
Now World Bollard Association is here why be anywhere else!
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Jan Rosenow @janrosenow.bsky.social · 10/11/2024
Most people don’t know this. Heat pumps REDUCE gas consumption even if running 100% on electricity from a gas fired power plant. More here in my piece for @carbonbrief.org 👇 www.carbonbrief.org/factcheck-18...
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Dr David Pegg @planetpegg.bsky.social · 08/11/2024
I love deep time; worlds upon worlds stacked ontop of each other each with a different story to tell.
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Pride in STEM @prideinstem.bsky.social · 07/11/2024
For new followers, we have put together a Starter Pack of LGBTQIA+ people in STEM. If you like to join it, please let us know - we still have room on this one or we can start a second one. And if you are on it and at any point it is unsafe to be do get in touch! go.bsky.app/BFc4wgf
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Dr David Pegg @planetpegg.bsky.social · 05/11/2024
To meet the Clean power by 2030 the UK needs to double its onshore wind (13GW to 27GW), triple its solar power from (15GW to 47GW) by 2030, 10-12 GW of flexible demand side response (e.g smart charging) as well as CCS power and nuclear plant life extensions. www.theguardian.com/business/202...
theguardian.com
Britain’s green energy pledge ‘credible’ if planning fixed, says system operator
State-owned Neso says Britain could be net exporter of green electricity by end of decade at no extra cost
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Simon Evans @drsimevans.carbonbrief.org · 04/11/2024
Ooft, UK petrol car sales fell 28% year-on-year in October 2024, with year-to-date sales down by more than 100,000 Meanwhile, strong EV sales mean the ZEV mandate "has been met", says New Automotive, which is odd bc I'm sure I've seen lots of scare stories saying it'd never happen
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Dr David Pegg @planetpegg.bsky.social · 31/10/2024
Celebrating Halloween with some spooktacular pumpkin pie by @chrisince.bsky.social and the Agatha all along finale
Slice of pumpkin pie
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Dr David Pegg @planetpegg.bsky.social · 27/10/2024
I've got a joke about electricity networks, but the punchline is shocking.
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John Curtis @johncurtis.bsky.social · 21/08/2024
Nobody will remember: - your salary - how “busy you were” - how many hours you worked People will remember: -If you didn’t put your publication date in a clearly visible place on your report
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Jan Rosenow @janrosenow.bsky.social · 22/08/2024
The primary energy fallacy is the idea that all primary energy from fossil fuels must be replaced with an equivalent amount of clean energy. BUT: This is not necessary because conversion losses do not need to be replaced. More than 2/3 of all primary energy is lost as waste heat.
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John Bull @garius.bsky.social · 22/08/2024
Holy Crap. This looks like amazing work. www.youtube.com/watch?v=_MER...
youtube.com
Coming Soon - Blake's 7 - The Collection! | BBC Studios
YouTube video by BBC Studios
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Dr Joanne Williams @jowilliams.bsky.social · 16/08/2024
10/10 for this fantastic caption from the BBC. www.bbc.co.uk/news/article...
Classic posed pic of a man in a cap and red jumper (no gloves or eye protection, tut tut) with a geological hammer and a carrot against a rock face. He is turned to face the camera. 
Caption reads: "The discovery was made by Elias Rugen, here pretending to hammer in a coveted golden spike. For now he's making do with a carrot"
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Dr David Pegg @planetpegg.bsky.social · 17/08/2024
Went to the library to return books to reduce my reading pile. So of course I now have a bigger reading pile.
media.tenor.com
a cartoon of a wizard holding a wand and a purple pot
Alt: Wizard magicing lots of books into his bag
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