Original sentence: Nevertheless, political and public debate continues.Some oil companies have funded public relations campaigns and contrary research to discredit the global scientific consensus.There is no scholarly debate amongst the scientific community as to whether or not human-made global warming is real
Edited sentence: Almost identical public relations and faulty research strategies were used leading up to the tobacco/cancer lawsuits in the United States and around the world.Nevertheless, political and public debate continues for a variety of reasons; one major reason being that some oil companies have funded public relations campaigns and faulty research to discredit the global scientific consensus.There is no debate amongst the scientific community as to whether or not human-made global warming is real