Exxon at Least 25 Years Away From Making Fuel From Algae

Exxon Mobil Corp.’s $600 million foray into creating motor fuels from algae may not succeed for at least another 25 years because of technical hurdles, Chairman and Chief Executive Officer Rex Tillerson said.

So far, scientists haven’t been able to develop a strain of algae that reproduces quickly enough and behaves in a manner that would produce enough raw material to supply a refinery, Tillerson said in an interview that aired yesterday on PBS television’s “Charlie Rose” show.