(AXIOS) — In a big shift, ExxonMobil is now helping fund a multi-million dollar political advocacy campaign lobbying Congress for a price on carbon emissions.

Why it matters: This is a significant turning point in Washington’s mostly static climate debate. Exxon officials have said for years they support a carbon tax, but they haven’t backed that up with actual lobbying dollars — until now. This move increases the odds that Capitol Hill could consider big changes to climate and energy policy in the coming years.

The big picture: A seminal report released this week by a United Nations scientific body underscored the growing urgency of climate change, the collective lack of will to address it and how a price on greenhouse gas emissions is an essential part of the solution.

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