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The way it works is that you go in, make your purchase as normal, pay the normal price but you ask for a 'green receipt'. The business then puts a portion of that money towards improvements.
No one loses, but we're helping increase the investment in a low carbon economy. Little steps, but no less important for all that.
One of those local businesses is Mr Lawrence wine bar who've made a commitment to make their business more environmentally friendly, starting with their lighting.
Here I am holding my green receipt, smiling away due to the lovely coffee I'd just had. I should point out that this picture was taken last week and I'd just been snowed on in this picture, I've not been afflicted with a terrible case of dandruff despite how it looks!