The graph depict the consumption of energy since 1980 with prediction until 2030. The energy consumption could be divided into six sectors, petrol and oil, coal, natural gas and clean energies, for instance, nuclear, solar wind and hydropower.

It’s obvious that the consumption of petrol and oil always play most important part compare to other energies. The consumption of coal and natural gas is between the petrol, oil and other clean energy. In fact, the clean energy only occupy small sector of the energy consumption.

In detail, the consumption of petrol, oil and coal all decreased slightly from 1980 to 1985 and then increased steadily from 1990. The projection of the consumption of natural gas will go up than coal according to the 2008 report. And the other clean energy, will increase slightly but the quadrillion units keep lower than 10.