The bar charts represent statistics about the generation of electricity in the US between a 10 year period between 2009 and 2019. The most noticeable feature about the graphs is the decrease in use of coal and instead opting for natural gas and other renewable energy sources.
The use of coal for electricity has drastically declined from 1756 billion kilowatt-hours in 2009 to just 966 billion kilowatt-hours in 2019. In contrast, amongst the non-renewable energy sources the use of natural gas has shot up from 921 billion kilowatt-hours to 1582 billion kilowatt-hours over the 10 years. Also the rise of renewable energy sources almost doubling helps the decrease in dependency of coal as a primary energy source.
The second chart shows the surging in sources of different renewable sources like for solar and wind energy. The use of wind energy has tripled from 94 billion kilowatt-hours in 2009 to 300 billion kilowatt-hours to 2019, whereas, solar use jumped from 1 billion in 2009 to 73 billion kilowatt-hours in 2019. Other sources, such as hydroelectric and geothermal energy, remained relatively stable over the period.