On May 4, along the shores of Lake Lucerne, in Seelisberg, Switzerland, Aldo Steinfeld went for a ride on his Harley-Davidson. The day was warm and sunny, with stunning panoramic views of the Swiss mountains, and Steinfeld was making the first motorcycle ride powered by fuel created by the sun. I was there to document this trip on assignment for NatGeo US: the fuel was manufactured at the DAWN plant in Julich, Germany, which is owned and operated by Synhelion, a company that researches ways to replace petroleum products with sustainable, synthetic fuels and whose technology Steinfeld has helped pioneer.

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