Documents show industry-backed Air Pollution Foundation uncovered the severe harm climate change would wreak
The fossil fuel industry funded some of the world’s most foundational climate science as early as 1954, newly unearthed documents have shown, including the early research of Charles Keeling, famous for the so-called ‘Keeling curve’ that has charted the upward march of the Earth’s carbon dioxide levels.
I think it's the proof part that's new.