<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Why did Biden shut down the Keystone Pipeline?
<|assistant|>
In November 2016, then-President Obama rejected the permits necessary for the construction of the Keystone Pipeline, citing concerns that the project might "undercut" the United States' efforts to combat climate change. This was due in part to the pressure put forth by then-Vice President Joe Biden, who opposed the measure. Biden's position was that the project was inconsistent with America's commitment to aggressively combat climate change, as well as the nation's obligations under the Paris climate agreement.