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As machine learning models grow in size, so too does their carbon footprint. As AI scales, it's important that we quantify and mitigate these emissions. In our new short course Carbon Aware Computing for GenAI Developers you'll learn from Google Cloud Developer Advocate Nikita Namjoshi how to: - Query...

105,900 views • 2 years ago •via X (Twitter)

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2026 Conservative Claire Coutinho claims the UK's pursuit of Net Zero is driven by ideology, and that using less wind and solar could save the equivalent of around £500 per household a year 2023: Conservative Claire Coutinho, "Nothing will distract us from achieving Net Zero or driving forward with renewables" The claim that less wind and solar would save every household £500 a year is deeply misleading. Coutinho is effectively taking the result of a model that changes almost the entire future electricity system—less wind and solar, much more nuclear and gas, different grid requirements and, crucially, no carbon price—and presenting the resulting £500-plus difference as though it were the cost of renewables. The research simply doesn't establish that. The figure does not come from evidence that renewables currently add £500 to household bills. It comes from a Conservative-backed modelling exercise comparing two hypothetical energy systems and turning £320 billion of estimated economy-wide savings between 2030 and 2050 into an annual equivalent per household. Crucially, the supposedly cheaper alternative doesn't simply build less wind and solar. It assumes far more nuclear power, substantially more unabated gas, lower spending on networks and balancing, and the removal of carbon pricing from electricity generation. Of the £320 billion headline saving, £137bn comes from assumed lower network costs, £67bn from balancing and ancillary services, £22bn from subsidies and capacity costs, and £94bn from lower wholesale prices. That £94 billion is particularly important because much of that supposed saving is created by changing the rules of the comparison. The existing-policy scenario assumes generators continue paying a carbon price which rises substantially towards 2050; the alternative effectively abolishes that carbon price from 2031. Unsurprisingly, a model in which gas-fired electricity no longer carries that cost produces cheaper wholesale electricity. But that isn't evidence that wind and solar made electricity £94bn more expensive. It is principally the consequence of assuming a major carbon-pricing policy is abolished. Nor is removing carbon pricing simply £94bn of free money. Carbon pricing is deliberately intended to make polluters account for their emissions, discourage fossil-fuel generation and encourage cleaner alternatives, while carbon allowances also generate government revenue. Removing it means accepting considerably greater emissions and losing those revenues and incentives. The alternative model consequently produces hundreds of millions of tonnes of additional CO₂. The model also assumes Britain can successfully build around 20GW of nuclear capacity, while retaining much greater dependence on gas. Whether nuclear can be delivered at the assumed cost and timetable is far from guaranteed, while greater reliance on gas leaves households more vulnerable to international gas-price shocks—the same exposure that played such a large role in Britain's recent energy-price crisis. There is a legitimate argument about the costs associated with large amounts of wind and solar. An electricity system dependent on intermittent generation requires substantial investment in transmission, balancing, storage, interconnectors and backup capacity, and those costs shouldn't be ignored. But that is very different from demonstrating that wind and solar cost every household £500 a year. Nearly £100bn of the supposed saving comes from the decision to remove carbon pricing, not from discovering that wind and solar are £100bn more expensive. Coutinho has taken a £500-plus headline generated by a Conservative-backed model containing a whole package of assumptions—less wind and solar, much more nuclear, more gas, less grid investment and the abolition of carbon pricing—and presented it to the public as evidence that Britain's reliance on wind and solar is costing households hundreds of pounds. That's misleading because the model doesn't establish that. It establishes that, if you change the entire future energy system and the taxes imposed upon it, its authors calculate a lower overall system cost. Turning that into “less wind and solar will save your household £500” strips away the assumptions that actually produce the number.

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