CLEAN : Nearly half of world's population "very vulnerable" to climate change: IPCC report

The video highlights the urgent need for climate action due to a closing window of opportunity. It discusses the vulnerability of 3.3 to 3.6 billion people globally, particularly in small island states and areas affected by poverty. Coastal cities are emphasized as critical areas for action, with options for adaptation including seawalls and ecosystem restoration. The report also addresses regional impacts, noting the importance of action despite global conflicts like the war in Ukraine. Ignoring climate change is not an option due to its existential threat.

Why is ignoring climate change not considered an option?

What are the existential threats posed by climate change as mentioned in the text?