environment – The Idea String

Is Infrared heating the renewable silver bullet?

Thermal images of people, dog and coffee mugs

(reading time: 10 mins)

Could infrared be the renewable alternative to gas central heating for Britain’s ageing housing stock?

As my twenty five year old combi-boiler approaches the end of its life, I’ve been looking for a more renewable heating option. Infrared heaters are fairly cheap to buy. The purchase cost for infrared heaters would cost me around £2.5k. By contrast my lowest quote for air source heating was £11k, only £4.5k of which could be recovered with the government renewable heat incentive (RHI) payments.

So during the winter 2019/2020 I tested far infrared (FIR) panels in one room. Continue reading…

The limits of Extinction Rebellion

Extinction Rebellion flags in Bristol July 2019

(reading time: 4 mins)

Why was I absent from Bristol’s Extinction Rebellion protests last week? I’m a left leaning voter who accepts time is running out for climate change action. Last winter I spent eight days upgrading my loft insulation to reduce my gas consumption by about 10% – which is one of many actions I’ve taken to reduce my carbon output. So why did I cycle past the protest each day instead of joining in?

Although XR are doing an important job of keeping climate change in the news cycle, I believe there’s a limit to what XR’s protests will achieve.

When is a tax not a tax? When it’s a carbon dividend

Oil extraction

(reading time: 8 mins)

Scientists and economists have long advocated carbon taxes as the most effective way to remove carbon from the world economy. The carbon dividend is one of the few ways to make carbon taxes politically acceptable.

But while taxing carbon may be vital, people rarely vote for new taxes. While left of centre Europeans like me want increased funding for public services, history shows it’s an uphill task selling voters the tax increases needed to pay for them. It’s too easy for voters and politicians to think short-term and let future generations pay, with the cost of inaction rising all the time.

However the strength of the carbon dividend may be its cross party appeal. In different forms, the carbon dividend has long been popular with environmentalists (it is UK Green party policy), but is also gaining traction with Republicans and Libertarians. Continue reading…

How to build a green roofed garden store

Since I laid out my slate patio a few years back I’ve used it less than expected. I realised lack of storage was one reason for this. Along with the inevitable broken flower pots and recycling bins, the odd bag of rubble or scrap of wood temporarily parked until the next recycling centre trip was giving my back garden a builder’s yard vibe!

Instead of storing my rubbish in an ugly plastic box, I built my own green roofed garden store. I chose Sedum turf instead of wildflower because although both encourage pollinating insects, as Sedums are semi-evergreen they give you something to look at through the winter as well as summer. Continue reading…

Climate change, anxieties and actions

(reading time: 11 mins)

This summer’s heatwave through Europe and Asia was one of many extraordinary weather events, which along with forest fires, storms and flash floods, are becoming less extraordinary every year. Scientists are not claiming direct cause and effect for individual weather events, rather there is a very simple principle at work – CO2 and Methane put more energy into our weather systems. The more energy goes in, the more energy comes out, with greater frequency and intensity of extreme weather events.

The IPCC October 2018 report and the ‘hothouse earth’ report that rounded off the summer both re-state that climate change may become irreversible, but with the worrying twist that the tipping point may be closer than previously thought. There are more frequent warnings that we really could leave Earth permanently damaged for our species, perhaps within a few generations.

Such headlines grab the attention for a time because our hunter-gatherer brains are hardwired to monitor for immediate threats. However as the solution requires action outside of our control, what remains is often a sense of powerlessness. Continue reading…

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BioDiesel. The Good, the Bad, and the Chippy

biodiesel tanks on a farm

(reading time: 4 mins)

I do around 2000 miles per year by car. To further reduce carbon emissions and air pollution I’ve been filling up my Golf Tdi mk4 with recycled food oil biodiesel. Crops grown for Biofuels compete with food production for land and water. However recycling food oil into fuel should not be dismissed as it reduces carbon and generally burns more cleanly than standard mineral diesel.

In use I’ve found no loss of power and the engine runs as smoothly as before, if not slightly better. Because biodiesel contains more Oxygen and cleans deposits from your fuel system, it’s recommended to change the fuel filter after the first 1000 miles. My 2002 Golf Tdi is well suited to running 100% biodiesel. Continue reading…