The principal concerns of our confused worldare still the fundamentalones
offood, shelter,and warmth, aggravated by an awareness ofa growing
humanpopulation,its economic and materialwell-being, andevensurvival,
set against the ﬁnite resourcesof non-renewablefossil fuels and minerals,
and the unequal access to them. World population is about 6.3 billion and
growingat about 2%per annum,givinga doubling period of 35 years. Global
energyproduction for 2005isprojected to be about 12600 million tonnesoil
equivalent (TOE),an average of 2t perperson, very unevenly distributed.