Right, a classic example of Greenwashing would be the UK's Drax power plant.
Drax burns "waste wood" to make electricity and argues that this is a carbon neutral endeavour.
Now, on the one hand yes these are not fossil fuels. The trees grew, probably over decades or centuries, but they weren't underground for millions of years before we burned them. However, "waste wood" to a lay person conjures ideas of sawdust or the offcuts from woodworking or maybe the bark from trees pulped for paper, something like that. Drax actually uses specially made pellets, produced in places such as Canada, from whole forests which are designated "waste" so as to meet their requirements...
Because this is "green" the majority of the UK's "green electricity" subsidies are spent on Drax†. And yet when you see people ranting about these subsidies being too high, they will invariably point at Wind Farms and Solar power.
† Because Drax is relatively old, lots of its subsidies are via an obsolete scheme we don't get raw data for, so all we can see is that billions of pounds were spent in the overall budget and the rational explanation is that we paid them to Drax. In 2027 Drax will move entirely to Contracts for Difference like a modern renewable power plant so then we can see more clearly what we're getting and how much it's costing under those new CfDs.