Because since basically forever, people have been claiming doomsday based on nothing. Mayan calendar!
Obviously this is climate change related so lets just stick with climate change doomsdays.
~1969, The UK won't exist in 2000 ~1970, food and water rationing by 1980s ~1975, new ice age upon us. ~1988, NYC under water in the 2000s: https://web.archive.org/web/20110202162233/https://www.salon... ~1989, entire nations wiped off the planet by global warming: https://www.snopes.com/fact-check/nations-vanish-global-warm... ~2000, snowfall a thing of the past: https://web.archive.org/web/20150912124604/http://www.indepe...
Might I interject, I have 30cm of snow coming in the next couple days. Mmmm Canada.
~2005, 50 million climate change refugees by 2010: https://www.theguardian.com/environment/2005/oct/12/naturald... ~2006, Super hurricanes! https://www.breitbart.com/the-media/2015/06/01/media-fail-no...
Lets just look at that last one. The rationalization seems sound. So much more energy in the oceans would seem to suggest it would give more power to hurricanes. but the exact opposite of the prediction happened.
~2006, inconvenient truth by al gore? Except the title it a lie. Virtually every one of his claims have been falsified now. https://www.oprah.com/g/image-resizer?width=670&link=http://...
Yes that's al gore in the inconvenient truth predicting florida significantly under water, years ago.
What is the motivation behind Al gore's false claims?
https://www.forbes.com/sites/jeffmcmahon/2015/12/03/al-gore-...
Al Gore invested $ in renewables, he will profit greatly when we switch over. However, as an evangelist, he may be exagerating the doom and gloom a lot.