"Cheers" bartenders duel over the environment

1. Sam "Mayday" Malone here:

Danson also said the issue of overfishing and ocean contamination is competing against global warming for the public's attention. But, he said, both equally deserve the spotlight.

2. In a video here, Woody Boyd claims that global warming may drive 50% of Earth's life into extinction. He doesn't even mention overfishing and ocean contamination!