EIA

It could exceed 2,500MW over the next four years if currently planned additions are completed and no operating capacity is retired

Production in December last year was the highest monthly level seen in US history

Full implementation of EU environmental legislation is expected to save the economy around €55bn every year

They have risen since 2016 as international prices have made it more economic for US producers to sell the fuel source overseas

It is forecast to happen as increases in crude oil and natural gas production outpace growth in US energy consumption

It has continued to export more natural gas than it imports for five of the first six months in 2018

They were the top sources of growth between 2005 and 2015

The trend is expected to continue for the rest of the year as well as through 2019

Coal generation still provides the largest power share in 18 states

Investment in customer meters has also more than doubled over the past decade as companies have upgraded them to smart meters