President Donald Trump on Tuesday took steps to advance construction on two oil pipeline projects that have been fiercely disputed and were delayed under his predecessor, NBC News has confirmed.

Trump signed executive orders that will make it easier for TransCanada to construct the Keystone XL pipeline and for Energy Transfer Partners to build the final uncompleted portion of the Dakota Access pipeline.

The Keystone XL would bring oil from Alberta, Canada, to Nebraska, where it would connect to an existing pipeline to bring the crude to Illinois. Former President Barack Obama refused to approve the cross-border project, saying the environmental review was not adequate in light of its route through the Sandhills ecosystem in Nebraska.