Friday November 8th

Organic oat porridge with pinch of guerande salt and ground camelina seeds – 100g

2 x tea with milk – 100g

1 x black spiced chai – 21g

1 latte with oat milk – 50g

1 x fish and chips with mushy peas, tartare sauce, slice of lemon  and tomato ketchup – guesstimate 1.2kg

Note: 2.7kg CO2 per kilo of filleted fish. A lot of batter on my Gastropub fish but I am guessing 250g weight which means 675g CO2 for the fish. I had a craving for Fish and Chips for a few days with the drop in temperature. And gave in.

Half a pint of on tap local cider – 150g

1 hour gas central heating – ?

The first day/evening  I have turned on my gas central heating. The BBC weather forecasts 1C tonight in London. Yeah it felt near freezing. Mike Berners-Lee (How Bad are Bananas: The Carbon Footprint of Everything) puts a modern ‘efficient’ gas boiler at 244g for a unit of heat (1 kilowatt-hour). By efficient he means 90% efficient. Having looked at the details of my ATAG boiler, I see it is 88% efficient so I will take that as close enough. To put that in context, an older older gas boiler would be 55% efficient and use 600g CO2 per kWh. A solar water-heating panel would be 50g per kWh. An electric boiler at 600g per kWh (However that may have changed with a cleaner electric grid?) I still have to do calculations. It looks like the easiest way is to take meter readings. So I will plan a bit ahead for my next blast of warmth. Your gas meter provides data in cubic feet or metres. Readings are taken then converted to kilowatt hours (kWh) for billing purposes.  I am pretty certain my gas meter is in imperial feet as opposed to metric metres, as its ancient!

Roast vegetables, 50g anchovy (200g) with white organic pasta – 450g

2 hours BBC iplayer – 176g

UK average water use – 38g

Time online – approx 5 hours –

Data and servers – 5 x 50 = 250g

Device – iphone – 5 x 12g = 60g

Tweets 50 – 50 x 0.02 =1g

Fridge – 64g

3 wordpress blogs – ?

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