Wright, the founder of a fracking firm, testified that he would back all forms of low-carbon energy as well as gas, oil and coal.

As the CEO of the Colorado-based Liberty Energy who has said "there is no climate crisis," Wright's nomination comes with controversy.

Chris Wright, President-elect Donald Trump’s pick for energy secretary, told senators during his confirmation hearing Wednesday that he would promote all sources of American energy, while also acknowledging the burning of fossil fuels causes climate change.