This line gragh shows the accurate number of consumption in six different energies in the U.S. from 1980 to 2008, and forcasts untill 2030.
Since 1980, beginning with 35 quadrillion units, the usage of petrol and oil stays in a leading trand in all kinds of energy gunre, which also be assumed to consist in the following years and in 2030, it may reach 50.
At the starting point, the consumer demand of coal is 5 higher than the natural gas at 20, and being equal in 1985, 1995, 2005 and 2015. Both of them continuetly grew in undifined waves and the coal is predicted to be aboved the natural gas in 30.
The clean enetgy is varified into 3 categries, nuclear, solar/wind and hydropower. Although they share a same starting point in 3. The nuclear grew faster then the others and increased steadly, reaching 9 in the end. The solar/wind power and hydropower were very volalite during the period of 1985-2005, wich in the projections, remain with the position of solar/wind on top and hydropower below.
To sum up, although the fluctations of consumptions take place, the gap between the energy costing of petrol and oil and other type of resources will stay still, and the coal will reach the second place which exceeds the natural gas. With the silimar low-used situation, the nuclear rised up more rapidly compare to the solar/wind and hydropower.