“And they shall beat their swords into plowshares, and their spears into pruning hooks; nation shall not lift up sword against nation, neither shall they learn war anymore” - Isaiah 2.4.

Wise, germane words most of us would agree with.

And most of us would agree that, unless we take immediate and significant steps, threats to our livelihoods from climate change will become everyday reality.

So in the run up to Cop26, here’s a bold, yet achievable idea, which doesn’t seem to be on the political agenda. At least, not yet…

Wales has a sizeable arms manufacturing sector made up of 170 companies employing 23,000 people in highly-skilled jobs, many more if you include the complex supply chain, none of which we can afford to lose.

In terms of the sector’s contribution to the economy, the Ministry of Defence alone spends £1bn a year in Wales.

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The Welsh Government, rightly or wrongly, subsidises the arms industry, providing direct and indirect investment via our universities and research facilities.

On the other hand, difficult though it may be, we have to accept that armed conflict is incompatible with any commitment to protect the environment.

According to the Conflict and Environment Observatory, already extensive military pollution resulting from CO2 emissions, degradation of land and other natural resources is set to get worse as arms sales increase.

At the same time it is clear, too, that the green economy will grow dramatically worldwide and Wales is already well placed to benefit. Wind, tidal and solar energy sectors are already established here. The Holyhead hydrogen hub will soon be up and running.

Across all sectors of the economy - from food production to home insulation - the need for engineers, scientists, academics, project managers, among a host of professions, will be crucial if Wales is to take advantage of the investment opportunities which will surely come.

The main problem, however, is a shortage of skilled workers and an equal shortage of training opportunities.

We have to decide. Swords into plowshares? Yes, but without pitting the sword against the plowshare and, more importantly, by making the solid economic case for shifting to a green economy without compromising on jobs or skills.

In fact a shift of this magnitude will stretch everyone’s skills. But I’m convinced it’s do-able if we start now.

Here’s the plan: over the next 10 years those involved in the arms industry gradually transition to the green economy.

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Easier said than done, of course, but take a look at the 2014 report ‘Arms to Renewables’ by the Campaign against the Arms Trade. The report makes a strong economic case.

And to make matters better, the arms industry is already investing in green technology, so those skills are being developed, which should make the transition easier.

The only thing needed now is the political will to make it happen. It should be a no-brainer for any government with sufficient foresight; again, not for political reasons, but for hard-nosed economic ones.