Getting energy from the vine

WHEN TEXANS TALK OF LIQUID GOLD, THE CHANCES ARE THEY ARE REFERRING TO THE CRUDE OIL THAT IS SYNONYMOUS WITH THE LONE STAR STATE. BUT IN ALUCIA, SPAIN, ANY LOCAL USING THE SAME TERM WILL PROBABLY BE TALKING ABOUT OLIVE OIL, WIDELY USED THROUGHOUT THE MEDITERRANEAN AND BEYOND FOR COOKING. HOWEVER, AS ANDY ALLEN REPORTS FROM SPAIN, OLIVE RESIDUES ARE ALSO AN IMPORTANT ENERGY SOURCE.