Trump just signed executive orders to further the Keystone XL and Dakota Access pipelines.
Native Americans and environmentalists heavily opposed both projects.
"There is no economic development, there is no energy security, there is no agricultural security or food security unless we first have water security," said Chase Iron Eyes, a former candidate for U.S. Congress from North Dakota.
The Obama administration rejected the Keystone XL pipeline and denied a permit for the Dakota Access pipeline.
"I am, to a large extent, an environmentalist," Trump said. "I believe in it, but it's out of control."