Thread by @ClimateBen

We must avoid 1.5°C-1.7°C of global warming hell.

Climate models show 1.5°C-1.7°C will hit by 2029 without immediate economic system change.

System change may delay 1.5°C-1.7°C even if it can't prevent it.

And anyway, it's crucial: this system won't protect us at 1.5°C-1.7°C.

1. We can protect people and animals, species and ecosystems if we change the economic system, otherwise we're heading for 3°C-4°C by 2065-2100. Climate justice activists have been making this clear for years, decades..

Here's a thread to explore:

https://twitter.com/ClimateBen/status/1322848680844660738?s=20&t=EpwTzzHV3yHUhKRpqvr1xg

2. Biodiversity destruction and tree mortality are horrific at 1.5°C-1.7°C.

If we manage to reduce emissions to zero in the coming years, we must also deal with aerosols which threaten to unmask even more warming.

We can still act to protect species.

https://twitter.com/ClimateBen/status/1500544887128662017?t=7bzXJGVODNK7TzsOYaU9GA&s=19

3. Climate scientists generally expect 1.5°C by 2030, though 1.6°C is quite possible, and 1.7°C could hit even on a lower emissions scenario. We cannot rule out 1.8°C-2°C by 2030, and can expect it by 2040-2045 assuming business and system as usual.

https://twitter.com/ClimateBen/status/1501143273179516930?t=7bzXJGVODNK7TzsOYaU9GA&s=19

4. 'If temperatures rise to between 1.7 and 1.8C above the 1850s level, then.. half the human population could be exposed to periods of life-threatening climatic conditions arising from heat and humidity'

Economic growth is the threat.

Ecosystems thread:

https://twitter.com/ClimateBen/status/1499045997137256455?t=UgAuTindmkk0y7b5OPOXhw&s=19