She doesn't reject them. She states that they won't come in time and Natural Gas should be used as a transition to those green fuels.
These available fuels are required to supply the nation’s energy needs during the transition to green energy alternatives.
In the meantime, our nation cannot afford to wait for the capacity of renewable fuel sources to be large enough to meet our growing energy demands. So in a very real way delaying production in the Alaskan OCS will lead to less available natural gas for our nation meaning higher greenhouse gas concentrations.
Those are her words, not mine.