Acid rain is a type of pollution that attacks plants. It might seem strange to write music about acid rain, but the idea disturbed me so much that I couldn't help but imagine what plants must feel like being covered with unpleasant chemicals. The music has several layers of harsh rhythmic chords that attack simultaneously.
The piece was written for Spectrum, a British ensemble whose American keyboard player, Yvar Mikhashoff, commissioned the piece in 1986. ––Michael Gordon