Using things up completely until you've got all you can out of them could save around 443.7 kg CO2 per year (see here for full calculation and assumptions).
The CO2 values in the slider have been averaged over a month, and split equally over the four data points, calculated as follows:
Q. How often do you use every last bit of your consumables (like leftovers in the fridge or clothes or toothpaste) before you throw them away?
Endpoints:
Never = 0 kg
Always - (443.7) / (12 months) = 36.98 kg CO2
Midpoints:
A bit - (36.98) x (1/3) = 12.33 kg CO2
A lot - (36.98) x (2/3) = 24.65 kg CO2
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