The two pie charts comparing how much utilized five main sources (namely: oil, natural gas, coal, hydroelectric power and nuclear power) to produce energy in usa between 1980 and 1990

The two pie charts comparing how much utilized five main sources (namely: oil, natural gas, coal, hydroelectric power and nuclear power) to produce energy in USA between 1980 and 1990.
It is clear that, Americans did not more use nuclear and hydroelectric powers to energy production, however oil was well known for this process in that decade, even though half of produced energy belong to other two sources.
Firstly. In the beginning of the decade excited five sources played important role to manufactured energy in US and the highest proportion was oil in there with 42%. Natural gas and coal were used almost same figures, clearly natural gas more than quarter and coal 22%. One tens divided for two sources similarly for hydroelectric and nuclear powers.
Secondly, during the last ten years of millennium, the process of energy product oil still kept dominance due to oil organized one third Americans used energy. According to natural gas and coal, using the sources had been running about suchlike (natural gas 27%, coal 25%) as 1980s.Interestingly, both reports show the county need more energy to supply their local inhabitants they had to use powers with no more than 10%, because they have harm to people life.