Eco-Song is a theme album by Scottish singer songwriter Donovan.

The album, which was mastered at Estudi 1 in Llevant, Majorca,[1] is ascribed to "Donovan & Linda", giving co-credit to Donovan's wife and muse, Linda Lawrence.

Eco-Song is dedicated to climate change activist Greta Thunberg.

The songs are intended as the soundtrack for an opera by Donovan and Sebastian Dean, to be titled Slow Down World, based on the plot of four young students in Cork involved in a climate strike.

[4] It took 50 years from my first climate change protest song in 1968 and now, at last, here comes Greta the Great!