A
s it happened, the question didn’t arise, because not
long after, petroleum-based diesel oil became the
dominant fuel for diesel vehicles. But now, over a
century later, concerns over climate change and geopolitical
instability are creating a new chance for biofuels.
Policymakers across the world have mandated the use of
ever greater proportions of biofuels in recent years. In the
decades ahead, biofuels can continue to play an important
role, but only on the condition that society accepts biofuels
as a truly sustainable alternative.