Esso blues

This advert by Esso appeared in the Sunday Times and I would like to quote part of it:

To solve the world's energy problems will take massive investment, experience and skill...
But it is only through more efficient use of energy now that we will gain the necessary time.

It's good to see that Esso have captured the zeitgeist. Unfortunately this advert, which I discovered at my mother's house today, was published on November 25th, 1979.