It’s official……………

8 03 2017

I am now an old fart.

Yesterday, I turned 65 (will she still love me…?) and am now officially a pensioner. To celebrate, I did the unthinkable, flying over 2,500 km to join my family and friends in Queensland who all wanted to see me. Love miles George Monbiot calls them……. not only that, we also drove more than 300km in Glenda’s little car, though it would have only burned 15 litres of petrol doing so. I’m over feeling guilty over my travels now ; whatever I do (or don’t do) will not make one iota of difference to the outcomes of western civilisation…..

If ever I needed reminding of why I will never return to the big island, the weather while I was burning all those fossil fuels was downright awful. Maybe it’s because I am getting old, or maybe it’s due to climate change, but I could not remember the heat being as oppressive as it was……. as I type, in Geeveston, it’s 21 degrees (C of course…) and I have my shirt off……. after harvesting in the market garden, more later.

Everyone I spoke too was mumbling through the thick air about the oppressive heat, and the lack of rain…… worst summer in living memory, etc etc etc………… in the end, I spent most of the time eating, drinking, sweating (when not in airconditioning) or traveling by oil powered transport. Now I’m back, I have to wear off the pounds I put on in just three days!

Glenda and I made the time to see Bruce at Mt Glorious. Where too it was hot….. Mt Glorious? For Pete’s sake, it’s 600m above sea level..?

There’s never enough time to talk to Bruce. Like me, he is short of people he can have an actual conversation that makes sense with, and after just three hours, we had to go back down the mountain to the pea soup.

Bruce related a story to me that relates highly to an article I recently published about PV’s negative ERoEI. It goes something like this……:

His in-laws, who live off the grid near Stanthorpe in Queensland, had a pretty good 20 year old 24V battery bank charged with an array of 12V solar panels. It worked just fine, until the lady of the house decided to replace the fridge, and voila, the system could not cope. So she contacted the company who installed the original system to upgrade it. “But everything’s changed now” she was told…… you will have to replace the whole lot…. nonsense said Bruce (as I said when he was telling me what happened). 12V modules are a thing of the past now, unless you’re willing to pay for ‘camping’ versions of these things that cost ten times as much per Watt as the ‘conventional’ gear being screwed to everyone’s roofs these days…… talk about an expensive fridge.

The company involved could not be bothered to tinker with the system, they reckoned the batteries and associated inverter and charging gear were too old and not worth the effort. So off it all came, now replaced with the latest stuff, including the ridiculous use of a grid tied inverter needing to be hooked up to an ‘island’ bit of gear to make it work as a standalone inverter. And at 20 years old, all that stuff was right on the verge of paying itself off in energy return, but now it’s a pile of waste with a negative ERoEI. Bruce has the panels, but I suspect he doesn’t need them, though they could be good backup for his old system should anything go wrong with it……….

The other interesting thing that happened to me was on the flight up…… I just happened to sit next to this Canadian, who, after some banter, it was discovered knew all about peak oil and ‘the end of capitalism’. Maybe there are more and more people ‘getting it’ these days.


Steak from the neighbours, mashed potatoes with parsley and garlic from the garden, plus home grown beans – all washed down with home brewed cider made with apples from trees I can see from here…

Back to reality. I was a tad concerned about leaving my garden unattended, particularly not being watered in this warm weather, but I need not have worried, it seems to have thrived on neglect! This morning I harvested 7.3kg of tomatoes, 9.6kg of snow peas (!) and a 3kg zucchini that was as long as my arm…… a zuccini that big is not salable, so I chopped it up for the chooks. Waste nothing (unlike solar power companies).

I’m actually starting to feel like I’m living in abundance, at least for the time being. I ate a watermelon from the poly tunnel before leaving for Qld, and this morning I got stuck into a delicious rockmelon. I’ve been making blackberry jam, and there’s such a glut of berries now, I will be making more for the next couple of weeks…. and just before leaving, I bought half a pig from my neighbour, and is it soooo delicious……. Eat your heart out Queenslanders……

The 5 key elements of sustainable transport

13 04 2014

The 5 key elements of sustainable transport, or rather ‘so called’ sustainable transport makes for interesting reading.  Some of this info doesn’t really make much sense to me…. like the C intensity of different flights (business and economy, short and long) as a function of emissions per kilometre.

Interestingly, the difference between a ‘small car’ (a car that can only do 35MPG is NOT a small car!  But then, this is written in/for the USA….) and a grid charged electric car is only 15g CO2e/km, or just 9%.  By that measure, the Suzuki Alto I drove in Tasmania emits far less than an electric car, unless that car is 100% solar recharged.  And then I’m doubtful, because since we now know solar has a shockingly low ERoEI, it might be even closer than we think.  I’m also surprised cycling’s numbers are as high as they are shown here.  Does a cyclist really consume a whole lot more food than a motorist?

The article also states “People who live in cities have lower transport emissions.  Fuel economy may be lower in city traffic but that is more than made up for by the fact that city dwellers drive far less.”  Well that depends……  since moving from the city to the country, I’ve actually halved how much I drive!  Then it continues with “In 1950 less than 30% of the world’s population lived in cites, by 2010 that figure was over 50%, and by 2030 it is expected to surpass 60%. This natural trend to urbanization is a huge opportunity to for lowering both distance travelled per person and the carbon intensity of that travel.”  Whoever wrote this has obviously no idea cities will eventually be abandoned for being too far from their food sources, and due to the fact that when grids go down, none of the lifts will work!  Nor the sewerage……..

Shrink That Footprint


Transport is responsible for around a seventh of greenhouse gas emissions globally. Of these emissions almost two thirds are the result of passenger travel while the rest is due to freight.

So passenger travel is a big deal for climate.

In the chart above, which comes from our new eBook Emit This, we compare carbon intensity of different types of passenger transport on a per passenger kilometre basis.  Using it we can explain some elements important to the development of a sustainable transport system.

1) Fuel Economy

Our chart today compares the carbon intensity of different transport modes, per passenger kilometre.  The better fuel economy gets the lower emissions go.  If you just look at the cars you’ll see the large car (15 MPG) has emissions almost three times that of the hybrid car (45 MPG).

By improving fuel economy we can get the same mileage while generating fewer emissions.  Something that is achieved by making engines more efficient, vehicles lighter and bodies more aerodynamic.  But even then combustion engines remain relatively inefficient and produce emissions at the tailpipe, so improving them is really just a stop-gap en-route to sustainable transport.

2) Occupancy

The cheapest and simplest way to lower the carbon intensity of a passenger kilometre is to stick more people in the vehicle.  In each of the figures above car occupancy is assumed to be an average of 1.6 passengers (including the driver).  But most cars are designed for 5 people.

If you take a look at the bus examples the importance of occupancy becomes even more stark.  The local bus example has emissions seven times higher than the school bus.  While there routes may vary a little they are both diesel buses.  The main difference is that the school bus has very high occupancy.

With notable exception of flying public transport tends to have quite low carbon emissions, due largely to having relatively high occupancy.

3) Electrification

In the absence of breakthroughs in second generation biofuels electrification is the most important pathway to low carbon transport.

Electric cars using low carbon power have footprints less than half that of the best hybrid, even after you account for their larger manufacturing footprint.  Right down the bottom of our chart is the high-speed EuroStar rail which used low carbon French electricity. Though not on our chart the lowest carbon transport on earth is probably electrified public transport in a place like Norway where electricity generation is almost carbon free.

While there is a natural tendency to obsess about the electrification of cars, there are lots of interesting innovations occurring in the electrification  of rail, motorbikes, scooters and bikes.

4) Pedal power

They may be a bit low tech for some, but when it comes to carbon emissions bicycles are pretty cutting edge.  Even when you account for the foodprint of excess energy used when cycling, the humble bike is incredibly low carbon.

Bikes have obvious limitations around speed and distance, but for short trips in places with good infrastructure they are hard to beat in terms of carbon. They also have a great synergy with public transport systems like intercity rail.

5) Urbanization

Each of the first four elements we have described above refers to improving the carbon intensity of transport.  But emissions are a function of both how we travel and how far we travel.  One thing that tackles both of these issues is the trend towards urbanization.

People who live in cities have lower transport emissions.  Fuel economy may be lower in city traffic but that is more than made up for by the fact that city dwellers drive far less.  Electrification of public transport is more economic and practical in cities.  Occupancy on public transport systems is much higher.  And access to infrastructure for both cycling and walking is often better.

In 1950 less than 30% of the world’s population lived in cites, by 2010 that figure was over 50%, and by 2030 it is expected to surpass 60%. This natural trend to urbanization is a huge opportunity to for lowering both distance travelled per person and the carbon intensity of that travel.

Those are our five elements of sustainable transport: fuel economy, occupancy, electrification, pedal power and urbanization.

Check out our free new eBook Emit This for more ideas on getting more life out of less carbon.

Source: Shrink That Footprint. Reproduced with permission.