Palin agreed that he had been busy "polluting this environment on almost every conceivable form of carbon-emitting vehicle" but he claimed that his adventures reduced overall greenhouse gas emissions by encouraging people to remain on their sofas.
He had been busy "polluting this environment on almost every conceivable form of carbon-emitting vehicle". This was what Palin agreed. His adventures reduced overall greenhouse gas emissions by encouraging people. This was to remain on their sofas. This was what he claimed.