benefits – The Green Tau

Green Tau: the gas mystery

29th October 2026

Today I saw a Cadent (1) van with the slogan “Keeping you warm” which I questioned.

What did it mean?

Is this the only way of keeping warm? Are other alternatives available?

No to the first and yes to the second.

Electricity is definitely an alternative and if used to power a heat pump, is far more efficient at keeping homes warm. British Gas’s own web site say that a gas boiler is up to 90% whilst a heat pump can be up to 380% efficient. (2) This means for every unit of energy that goes into a heat pump the heat output will be nearly 4 times as much. Heat pumps are super efficient. To be fair at current prices the unit cost of electricity is more that the unit cost of gas. This is due to a quirk in the way electricity prices are calculated – bizarrely it is the high price of electricity produced by gas power stations rather than from renewable sources that accounts for this.(3) Are gas prices alway going to be less than electricity prices? Looking around the world and seeing the conflicts effecting gas, the answer surely is no.

On the other hand some electrical suppliers provide very attractive pricing packages that making running a heat pump much more affordable – eg Octopus Cosy (4)

However the cost of retrofit installing a heat pump is more than simply replacing a boiler – even with the currently available government grant (5). Keeping warm is always easier if you have enough spare income or capital. Gas may keep you warm if you can’t afford to invest in a better alternative.

Extra home insulation will certainly help keep you warm – and once paid for – at no extra cost. MoneySupermarket suggests for example that for a typical house loft insulation can save £380 a year on heating bills. (6) However again you do need the upfront cash. Curiously the Great British Insulation grant scheme was ended by the government earlier this year! – although there are still some grants for those in particularly constrained circumstances. (7)

Back to the ‘Keeping you Warm’ slogan. Is it an acknowledgment that burning gas is warming the planet keeping us all warm, like it or not? In England mean temperatures this summer were at least 2.4°C above average. (8)

Visiting Cadent’s website, you will find the longer version of their tag line: “We are Cadent. Keeping people warm, while protecting the planet”!!! (9) Surely they cannot both praise themselves for delivering gas to customers and praise themselves for protecting the planet? The more gas they deliver (to ‘keep us warm’) the greater the amount of dangerous greenhouse gas emissions being put into the atmosphere!

We seem to be stuck in a system where in all parts of the chain from gas fields to boilers, no one is calling time on the continued use of gas. Not even the government! It is barely a week since the government approved the licensing of the Jackdaw gas field on the grounds that it would protect security of supply – plus a (small) number of jobs – for the consumer. Jackdaw will increase domestic production of gas by 6% – which is a mere 2% of all the gas we currently use. (10) For this ‘benefit’ Jackdaw’s developer, Adura (a new joint Shell and Equinor company) will receive subsidies in terms of tax relief for development cost. Then after the anticipated 11 year life of Jackdaw, a further subsidies towards the costs of decommissioning the gas field. (11)

Surely it would be better for the government to use its financial resources and legislative clout to improve the insulation of buildings, to upgrade the electricity grid, and enable the installation of more solar panels, heat pumps and batteries? Equally would such measures be a more effective way of enabling the UK’s transition away from fossil fuels to a net zero renewables economy?

(1) Cadent is the company which looks after the UK’s gas pipe network; it doesn’t itself buy or sell or produce gas

(2) https://www.britishgas.co.uk/heating/guides/air-source-heat-pumps-vs-boilers.html

(3) https://www.carbonbrief.org/qa-why-are-uk-energy-bills-so-high-and-how-could-they-be-lowered

(4) https://octopus.energy/blog/heat-pump-run-cost-savings/

(5) https://www.moneysavingexpert.com/utilities/heat-pumps-grant/

(6) https://www.moneysupermarket.com/gas-and-electricity/loft-insulation/

(7) https://www.moneysavingexpert.com/utilities/free-cavity-loft-insulation/#lowincome

(8) https://www.metoffice.gov.uk/blog/2026/summer-2026-so-far-a-look-at-the-season-at-the-halfway-point-

(9) https://cadentgas.com/getmedia/54c406e9-88fe-4d3b-aa90-049e83c21cda/Introduction.pdf

(10) https://www.bbc.co.uk/news/articles/cq4g13pplyzzo

(11) https://theconversation.com/jackdaw-approval-what-a-new-north-sea-gasfield-means-for-uk-energy-security-bills-and-tax-291418 and https://www.e3g.org/news/north-sea-oil-gas-bad-deal-uk-taxpayer/

Counting on 2026 … day 4

12th January

Data centres – which includes those that provide AI – use large amounts of water, principally in providing cooling., but also (depending on the source of their electricity) from the water needed at fossil fuelled power plants where water is again needed for cooling. It is estimated that the water footprint of AI in 2025 was somewhere between 313 and 765 billion litres which apparently is roughly the same as the amount of bottled water consumed globally. (1)

This consumption of water is going to increase as our use of and development of AI continues to expand. By 2027 experts predict global water use by could reach 4.2–6.6 trillion litres annually – equivalent to about half the UK’s annual water consumption. (2)

In a world where freshwater is already in short supply, this is a serious issue as highlighted in this comment from a UK Government blog:

“AI has potential to address challenges in healthcare, inequality and climate monitoring. However, these benefits must be weighed against the full environmental impact of building and running AI systems. This requires development of a comprehensive and transparent series of metrics that include, carbon emissions, energy consumption, water usage, biodiversity and social impact. Only by looking at AI through these combined lenses can we ensure it delivers net benefit rather than widening inequality or disproportionately impacting communities and regions.” (3)

A UK government report ‘Water use in AI and Data Centre’ highlights the issue of the 2050 projected daily 5 billion litre water deficit versus the expansion of date centres in the UK. It notes with concern that in coming to its projection of a 5 billion litre water shortage, the Environment Agency has not included any figures for the anticipated increased water demands that will be made as data centres expand. This is aggravated by a lack of information as data centres are not required to be transparent about the amount of water and electricity that are and will be using. Mandating transparency would encourage data centre to find ways of minimising the resources they need and would enable the relevant authorities to make better decisions as to where new data centres could or should not be located. (They should not for example be located in areas already prone to water shortages). (4)

Equally if information about the likely consumption of scarce resources were more readily available, it would enable a better discussion as to whether we should be encouraged the unrestricted growth of AI and data centre, and have the ability to weigh up the benefits of AI against its detriments.

Counting on … day 169

12th September 2024

Trees benefit their environment – and this is of particular value in urban areas – by providing:

Shade
Cooling the air through the release of water vapour
Absorbing pollutants
Absorbing carbon dioxide
Reducing noise pollution
Slowing the rate at which rain reaches the ground as the water bounces off each leaf
Absorbing water via their roots – both of these reduce flood risks
Improving soil structure, helping it absorb more water
Decomposing leaves provide nutrients for the soil
Provide habitats for other organisms, improving biodiversity
Improving the mental and physical health of humans
As well as providing sources of food for birds, animals and insects, they can be a source of food for humans too.

For further information –

https://www.woodlandtrust.org.uk/protecting-trees-and-woods/benefits-of-urban-trees/

https://www.weforum.org/agenda/2022/06/cities-urban-trees-climate-change/

Windows of Opportunity

23rd December 2023

Pay taxes

Paying taxes is an essential part of maintaining safe and sustainable societies. Taxation pays for the public services which benefit the whole of society. Avoiding paying tax is destructive of societies and therefore of individual lives. Avoiding tax – whether as an individual or as a company – is wrong but is is the tax avoidance by large multinational companies that probably causes the most harm.

Ethical Consumer writes “Tax avoidance is shifting profits so you have to pay a lower rate of taxes. It involves using loop holes in tax systems so that you can reduce rates in a way that law makers never intended but which is entirely legal. Often, this means registering sales that took place in one country with a company based in another, where tax-rates are lower. For example, in 2017 Amazon registered almost 75% of its UK sales through a Luxembourg based subsidiary. Tax evasion is hiding profits or fiddling accounts in order to avoid taxes, and is definitely illegal. In 2017, it was estimated that globally tax avoidance was losing nations over $500 billion a year.

“In the UK, tax avoidance is channelling much needed money away from the NHS, housing and other vital forms of public infrastructure. But the cost of tax avoidance is even greater in poor nations. In countries where wages – and accordingly individual income taxes – are low, a far higher proportion of government revenue comes from corporate taxation. This can be as much as 16%, compared to 8% in richer countries.

“If looked at in proportion to GDP, the countries that lose the most from tax shifting are consistently the poorest. In Chad, during 2017, the estimated losses to profit shifting were larger than all of the (non-resource) taxes collected in the country that year.” (1)

In a report published in 2010 Christian Aid estimated “that just two forms of tax dodging, transfer mispricing and false invoicing, cost developing countries US$160 billion every year…roughly one and half times the world’s annual aid budget.” (2)

Not paying corporate taxes also affects the UK’s tax revenue. Corporate Tax News reported this summer that “Amazon’s main UK division, Amazon UK Services, has once again avoided paying corporation tax, thanks to tax credits received for its investments in infrastructure. While the company’s pretax profits and sales have increased, there are concerns about the lack of transparency around its total profits and tax contributions. Critics argue that Amazon’s ability to avoid taxes gives the company an unfair advantage over local businesses. The controversy has highlighted the need for more transparency and fair taxation practices from multinational companies operating in the UK.” And “Amazon invested £12 billion in the UK in 2021. This included £1.6 billion spent on infrastructure, such as more robotics for warehouses and a software development center in Swansea. The company’s sales across its entire UK network also increased by £1 billion, making it larger than Asda, the UK’s third-largest supermarket. Amazon claims that it paid a total of £781 million in taxes in the UK, including business rates, employer’s national insurance contributions, and corporation tax. However, critics argue that this figure does not provide a clear picture of Amazon’s tax contributions, especially when considering the tax credits received in the UK and other European countries.” (3)

Turn this round. Just think how more money could be invested in public services, in tackling the climate crisis, and in addressing global injustices, if all the taxes that should be paid, were paid!

The UN is one of the forums where global tax legislation could be reformed. “Developing nations could have a greater say over global tax rules after winning a diplomatic tussle at the United Nations in New York on Wednesday. A new resolution, agreed by UN members, gives the body a mandate to kickstart intergovernmental talks on tax. The policy area has long been dominated by the Paris-headquartered Organisation for Economic Co-operation and Development (OECD), a body largely formed of wealthy countries including the US, UK and Japan. The resolution, presented by the African Group, ultimately paves the way for a UN convention on taxation and a new global tax body, according to campaigners…The resolution was fiercely opposed by some western diplomats behind the scenes in New York, officials on both sides of the debate around the UN’s role on tax affairs said. Some rich nations, including the US, had fought against the resolution in an attempt to maintain a tighter grip on global tax rules. Campaigners want international agreement on measures such as a floor for corporate tax rates, so countries cannot undercut one another, and forcing multinationals to report how much tax they pay in each country.” (4) One of the key campaign groups is the Tax Justice Network – https://taxjustice.net/

In the UK the Fair Tax Foundation campaigns on this issue. “Tax contributions are a key part of the positive social and economic impact made by business – helping the communities in which they operate to deliver valuable public services and to build the infrastructure that allows business to thrive. Via our Fair Tax Mark accreditation scheme, we seek to encourage and recognise businesses that pay the right amount of corporate income tax at the right time and in the right place. We believe that businesses that pay their taxes willingly, fairly and transparently should be celebrated and rewarded.” (4)

As “Fair Tax is at the heart of a fair society, a strong economy and a functioning democracy.” The Fair Tax Foundation also runs a pledge scheme where by individuals and small traders – http://fairtaxpledge.uk/