Around the edges, there is a lot you can do.
I know a bloke who lives in the north and he has loads of photovoltaic panels and a 6kW wind turbine. Being where he is, the turbine obviously runs at 100% output 24/7
He could easily run his (specially built) house and an electric car off that lot. Or an electric plane.
But most people don't have that option. Wind turbines make a lot of noise; it needs to be a few hundred m away from the nearest neighbour.
And he spent several hundred k on the technology.