Elizabeth Warren, in a BuzzFeed News column published Wednesday, laid out what she'd seek to accomplish in her first 100 days on climate change.

Why it matters: Presidents have to make tough choices about where to deploy political capital, so Warren is signaling that this would be a priority.

The big picture: Warren vowed a day-one executive order "rolling back all of Donald Trump’s disastrous pro-fossil fuels policies," as well as banning new fossil fuel leases on public lands and waters.

Another move would be introducing legislation to enable a much faster transition away from fossil fuels.

Reality check: Despite the "100-day" vow, much of this would be a splashy move to undertake what would be time-consuming executive policy and push long-shot legislation.

Trump administration regulations can't be nixed via executive order. Instead, such an order would be a starting gun for agencies to get to work.

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