If only they'd promise to shut up in three years, it would be worth whatever mythical disaster would happen from not doing anything. The thing is, they'll never shut up. After 3 years we'd get them saying, "see I told you so" for the next hundred years.
A planet devastated by climate change may seem like a distant future. But Earth is already experiencing effects today.The problem is that every single one of those points has been contradicted by other studies. It's not the clear cut picture they portray. The acceleration of sea level rise has been disputed or disproven, and the other points are covered by the most important contradiction: the study that showed when temperature adjustments are removed, nearly all warming goes away. Actually, that's only one such study. There have been others. If the temperature record can't be trusted how do we know if California and Vietnam have really had their hottest temperatures? Prince Charles updated his 2009 claim that “we have 100 months to save the world” after about 72 of those 100 months saying in 2015 that the deadline is 35 years out. I'd say they should get their stories together, but inconsistency seems to be pretty common in the alarmist's world.
Globally, the mean rate of sea level rise increased 50% in the last two decades. In 2017, temperatures have already reached their highest levels in history in some areas, from California to Vietnam. And the past three years were the hottest on record.