The scientific consensus is more than clear, doing your own "research" isn't going to make a difference except to engage with the people that are already happy to ignore science. If anything you'd have to begin to wonder in what ways airports are going to be different from global averages and I can think of a whole pile of reasons why the two would diverge (such as the presence of a large chunk of asphalt or concrete…
they did much more work than the random person who believes evrything they see on TV. that should be saluted, not derided.