If one person recycles a piece of paper it doesn’t make much impact, but if every single person in this country (UK) recycles one piece of paper – that’s 60 million pieces of paper!
The same logic applies to all other countries!
Reuse bath and washing water on the plants and flowers.
Fit water butts on down-pipes to collect rainwater.
Fix any dripping taps.
Put left over food into smaller, lidded bowls rather than using cling film or foil.