United States President Donald Trump has advanced the construction of the controversial Keystone XL and Dakota Access oil pipelines through executive orders.
Trump signed the documents in the Oval Office and vowed to "renegotiate some of the terms" of the Keystone bill and said he would then seek to "get that pipeline built."
Trump's decision sets aside efforts by predecessor Barack Obama's administration to halt the construction of the two pipelines, reports CNN.
He also issued an executive order that declares that oil pipelines be constructed with US materials and to shorten the environmental review process.
The Dakota Access Pipeline or Bakken pipeline is 1,886 km underground oil pipeline project which is currently being constructed by Dakota Access, LLC, a subsidiary of Energy Transfer Partners, L.P.
The USD 3.78 billion project was announced to the public on 25 June, 2014 and was planned for delivery by 1 January, 2017.
The pipeline has been declared controversial with regard to its impact on the environment.
Several Native Americans in Iowa and the Dakotas have opposed the pipeline.
Thousands of people have been protesting against the construction of the pipeline.
The Keystone Pipeline System is an oil pipeline system in Canada and the United States, commissioned in 2010 and runs from the Western Canadian Sedimentary Basin in Alberta to refineries in Illinois and Texas, and also to oil tank farms and an oil pipeline distribution center in Cushing, Oklahoma.
The pipeline came to a greater prominence of attention when a planned fourth phase, Keystone XL, attracting growing environmental protest, became a symbol of the battle over climate change and fossil fuels, and in 2015 was rejected by then President Barack Obama.