Exxon Mobil Chairman and CEO Darren Woods is trying to influence the Trump administration‘s climate change policy plans, pushing the president-elect to stay in the Paris climate agreement and reject carbon border taxes supported by some GOP members.

Exxon has publicly supported the Paris climate agreement since 2015, and Woods claims a second departure from the agreement would harm the global fight against climate change. The company’s climate change policies have faced criticism for years, but Woods’s engagement in the political climate conversation comes as President-elect Donald Trump prepares to return to the White House and change current climate regulations.