Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
Anti-science, inactivism, and unsupported conspiracy theories are not ok here.
How are transport emissions not part of the EUs emissions trading scheme? ETS2 covers road transport, buildings and many small industry emitters, not covered by ETS already. The original ETS already includes air travel.
However going for 65% emissions reduction would certainly be a good move.