The energy group learned about this at our last meeting. One of our members, Adam, has just completed an MSc on the subject and explained all. Thanks Adam! This post was written by another member, Chris - thank you too!
What is renewable electricity?
Electricity is generated and pushed into the National Grid by “generator” companies. Some of them use gas, coal and nuclear power to generate electricity, which we call “non-renewable” because it is extracted from the Earth and can be used up. Gas and coal also contain carbon which they release (as carbon dioxide) when burned, which contributes to climate change (global heating).
Some generators use solar, wind, hydro, biomass (wood chip) or tidal power, which we call “renewable” because the Sun is constantly powering them, so they won’t run out. Building them emits carbon dioxide too, but they don’t usually emit any while operating (or, in the case of biomass, re-emit carbon dioxide that they recently removed from the air). We consider that they contribute much less to climate change.