I'm not sure if an individual choosing a "green energy supplier" is making any difference.
My (potentially naive, uneducated) logic is as follows:
higher demand for green energy = less demand for other energy
Less demand, therefore lower price, those who are polluting the most now have fewer incentives to switch. Supply and demand, elementary market forces.
I would like to better understand if choosing green energy makes any difference?
Personal note: I'm in the camp of effective altruism. In my version of reality, giving £1 to a homeless is a selfish "feel good" act that does solve the underlying problem of education, employability, affordable housing, mental health support, resilience and life skills.