I have also been warned about "sailing" off the edge of the world. I, and the overwhelming majority of the earth's adults choose to ignore it.
Give it a rest, aready.
Or conjure up a more believeable world crisis.
Or get a real job.
My standard question to global warming....
Who defines the optimal temperature of the planet? I'll now ask another..... Would the scientists and politicans be willing to be banned from all related fields, all grants public and private and all public speaking or writing if their predictions are proven wrong?