Once you've researched the best supplier, make the switch!
Tell your friends, family, and anyone who will listen to do the same! Some suppliers even offer referral bonuses for every person you get to sign-up.
The more demand for green energy, the more investment will go into renewable sources.
Why is this important?
Provisional figures compiled by the UK government estimate that in 2017 the residential sector was responsible for 64.1 Million Tons of emissions, and that figure doesn't include domestic energy supply which was included in the energy supply section (which had 105 Million Tons!).
When you switch to a green energy supplier, you're throwing your support behind a new power grid run on renewable energy which in-turn will result in a drive towards more renewables to meet that demand.