Welcome to The Green Ration Book

The average UK citizen creates 11 tonnes of Carbon Dioxide equivalent (CO2e)
a year. CO2e includes the effects of other greenhouse gasses as well as
the main greenhouse gas, carbon dioxide.

New UK targets aim to cut this by 80%.

Reducing these 11 tonnes by 80% gives a ration of 2.2 tonnes per year.
This makes a daily ration 6kg CO2.

Dividing the ration equally between categories “consumables”, “building”, “transport” and “government”, allows 1.5kg per day.

The estimates below are for CO2e and amount of a 1.5kg daily ration.
This is expressed as a time (e.g. a quarter of a daily ration is given as 6 hours).

An average TV on standby for 19 hours

CO2e: 0.12 Kg (2 hours)

http://www.tvec.org.uk/Energy_calc_2.asp give

TV, 49watts  (on), 13 watts  (standby)

For CO2 from electricity we have 0.1 Kg per megajoule

Assume TV on standby is 13watts.  19 hours is 72000 seconds.
Electrical energy is 13 * 72000 joules or 1.15 megajoules.
This creates 0.12 Kg CO2.

But for several different answers see http://uk.answers.yahoo.com/question/index?qid=20070716040535AARuwNB&show=7

Watching a small television for 5 hours

CO2e: 0.09kg (1 hour 40 mins)

Watching a small television for 5 hours.

http://michaelbluejay.com/electricity/howmuch.html gives

55-90 watts, 19″ television

For CO2 from electricity we have 0.1 Kg per megajoule

Assume small TV is 50 watts.  5 hours is 18000 seconds.
Electrical energy is 50 * 18000 joules or 0.90 megajoules.

This creates 0.09 Kg CO2.

Bunch of flowers from Kenya

CO2e: 6kg (4 days)

The precis report of Comparative Study of Cut Roses for the British Market Produced in Kenya and the Netherlands
“The production at Oserian [Kenya] and delivery to the World Flowers RDC of the functional unit of 12,000 cut rose stems incurs 53,000 MJ primary energy and emits 2,200 kg CO2 (without including any allowance for the altitude of emissions). 7,800 MJ (15%) is fossil.”

Cut rose stems we have measured weigh an average of 25 gm so 12,000 cut stems weigh approximately 300 kg

For long haul passenger transport, including a radiative forcing index of 2.0, we have 210 gm CO2e per passenger kilometer

At approximately 10 passengers+luggage per tonne, this would suggest 2.10 kg per tonne-kilometer for freight.
So about every 500 kms goods carried will create their own weight in CO2e.

But Adidas give a figure of 0.903 kg per tonne-kilometer
(See http://www.adidas-group.com/en/sustainability/environment/tackling_pollution/co2_emissions_from_transport_and_travel/default.asp)
Using a radiative forcing index of 2.0 this gives 1.806 kg per tonne-kilometer for CO2e. This implies that every 554 kms goods carried will create their own weight in CO2e.

Nairobi airport is 6800 km from London so an estimate of 300 kg air freighted to London is 3,684 kg CO2e (1,842 kg CO2 without RFI multiplier of 2.0).

7,800 Mj of fossil generated electricity at 0.1 Kg per MJ give 780 kg of CO2.

780 + 1,842 kgs =2,622 kgs CO2 . This seems to compare reasonably well with the 2,200 kg CO2 quoted in the World Flowers report.

This gives 780+3,684 =4,464 Kg of CO2e for 12,000 rose stems. This is 370 gm CO2e per rose stem.

Local transport, refridgeration and wasteage will increase this. 500 gm per stem seems reasonable.

A bunch of lowers from Kenya, say, 6.00 kg.

342 gm Beef steak

CO2e: 8.63 kg (5 days 18 hours)

Beef is 25.23 times its own weight in CO2e

1500g Flour

CO2e: 1.20 kg (19 hours)

6 Eggs

CO2e: 1.29 kg (21 hours)

750 gm Chicken

CO2e: 2.98 kg (2 days)

Poultry meat is 3.98 times its own weight in CO2e

350 gm Pork chops

CO2e: 2.54 kg (1 day 17 hours)

Pig meat is 7.25 its own weight in CO2e

454 gm Lamb chops

CO2e: 11.85 kg (7 days 22 hours)

Sheep meat is 26.10 times its own weight in CO2e

500 gm tomatoes

CO2e: 4.70 kg (3 days 5 hours)