I have no idea how you can conclude that this lobbyist is exaggerating his accomplishments, specially considering his career and what Exxon have been doing since the 70s (https://en.wikipedia.org/wiki/ExxonMobil_climate_change_cont...). I guess one could claim that there is nothing "new" into this story, but how can you possibly say that there is nothing controversial regarding being part of a massive decades-long disinformation and anti-environmental campaign?