There are many dangers emerging from climate change.
The biggest risk of the current global warming is that there are many ways in which warming can cause more warming, which causes more warming, and so on. See: Warming causing more warming: Amplifying feedbacks.
There are also dangers associated with:
So much change threatens the stability which maintains the web of life and supports life as we know it. It threatens to exacerbate human difficulties and create chaos for the 7.6 billion people on the planet.
Consider a 3 C increase in temperature
If rapid action does not occur, then the planet is headed for a temperature increase of 3 C above pre-industrial temperatures, and more. We do not know where the Earth’s tipping points are, but these temperature increases could take us past one of these tipping points, to heating beyond human control, and the extinction of a large proportion of all species on the planet. During the Pliocene, the temperature of the planet was about 3 C higher than our pre-industrial temperatures. The seas were 25 metres higher for a period of three million years.
(What would 3 degrees mean: Climate Code Red: Sep 2010)
Allowing global heating is a crime
Around the globe, many politicians and media barons promote the use of fossil fuels and oppose action to limit climate change, e.g. the Trump administration in the US, the Federal Coalition government in Australia, and the Murdoch press.
These people have the whole world of information at their fingertips, so they should know the dangers of climate change. To oppose climate action with the knowledge of its danger is to support the destruction of our liveable planet. So, whether they are acting in ignorance or with knowledge, this is a crime of the highest order. They are climate criminals.
(I am a climate alarmist. Global warming is a crime against humanity: The Guardian: 30 April 2017: Lawrence Torcello)
Updated 14 Dec 2020