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Cycling like the Dutch would slash the world’s carbon footprint
(www.euronews.com)
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.
I feel like we're kinda derailing the discussion if our point of reference is North America. You guys have spent generations building a car-centric society. The same is not true for most countries. You can fix it but your solution will probably involve a lot more public transit rather than bicycles.