Electricity generation. The production of electricity in 2013 was 23,322TWh. Sources of electricity were coal and peat 41%, natural gas 22%, hydroelectric 16%, nuclear power 11%, oil 4%, biomass and waste 2% and other sources 4%.
The nine Supreme Court Justices on the Supreme Court of the United States are the final arbiters on whether or not a law passed by the legislative branch is constitutional.
1 Supreme Court is most powerful and important institution of judicial branch. 2  Constitution does not stipulate the number of justices on the Supreme Court. 3  Today there are 9 Supreme Court justices; in the past the number has changed. 4  Justices (and lower court judges) are appointed, not elected.