274 Energy andtransport for thefuture
Figure 11.5Primary energy demand by economic groupings of countries for
WEC scenarios.Figure 11.6Primary energy supply mix for WEC scenarios.Population growth and the need for economic development in developing
countries make it inevitable that they will, for many decades, consume
increased amounts of energy. For all the scenarios to 2020, fossil fuels
continue to dominate the energy mix (Figure 11.6). The contribution
from nuclear power is assumed to grow in all the cases. New renewable
energy sources play an increasing role, although apart from Case C their
contribution is small.
For the ‘ecologically driven’ WEC scenario C the energy demand
in 2020 is about thirty per cent more than that in 1990 and thirty per
cent less than that for scenario A. Scenario C assumes that there will
be large increases in efficiency (or a large decrease in energy intensity)
leading to a reduced energy demand and also, following the results of