Act on CO2

1. Only boil as much water as you need

Leave the free bag in a bit longer and you can get a drinkable cup of tea from cooler water.

2. Don't use your car for short journeys

There are plenty of taxis around, it might cost more and the round trip will be twice as long, but you can feel smug when a nice flash merc comes and picks you up in front of the neighbours

3. Switch to energy-saving bulbs

Maybe if they were VAT free

4. Turn off your appliances instead of leaving them on standby

Why bother having standby facilities?

5. Turn down thermostat

Granny won't mind, she lived through the winter of discontent, just tell her to knit another pully

6. Cook in a microwave

Remember to put a couple of splits in the bag first and throw the boxes on the bonfire afterwards.