Not sure if this is “greenwash” but it is being looked into in the UK.
Pioneering trial for solar-powered trains - Network Rail
A pioneering trial to use solar energy to partly power a railway line has become our latest effort to develop a greener network. Last month, social enterprise Riding Sunbeams switched on the first ever solar panels to directly supply a railway line with electricity, paving the way for the world’s ... Read more
Been proven to work already – we need them in the UK as we rely on diesel too much
Not sure if this is “greenwash” but it is being looked into in the UK.