Energy production and consumption surveys in four US states

In order to evaluate the first question, we construct energy profiles of the four continents both in static and dynamic aspect. We divide their structure into two parts: energy production and consumption. Firstly, we remove the redundancy of the data by classifying and consolidating. Then, based on the screened-out data, we give the figures of energy production and consumption in 2009 as the static example. As for dynamic energy profile, we extract historical data from 1969 to 2009, provide line charts of energy production and consumption output to shows the dynamic changes in the four states. Then, we select 79 representative groups of data from three angles: unit meaning, physical meaning of variables and mathematical meaning. By using the shortest distance method, many variables are roughly divided into two categories: energy production and energy consumption. Then, the principal components of energy production and consumption are selected by principal component analysis. Furthermore, the stacking column figures of the main components from 1960 to 2009 are drawn to qualitatively analyze the energy structure of each state considering differences and similarities of geography, climate and so on among the four states.