Read the excerpt from Greta Thunberg’s speech at the United Nations Climate Action Summit.

So a 50% risk is simply not acceptable to us—we who have to live with the consequences.

To have a 67% chance of staying below a 1.5 degrees global temperature rise—the best odds given by the [Intergovernmental Panel on Climate Change]—the world had 420 gigatons of CO2 left to emit back on January 1, 2018. Today that figure is already down to less than 350 gigatons.

How dare you pretend that this can be solved with just "business as usual” and some technical solutions? With today’s emissions levels, that remaining CO2 budget will be entirely gone within less than 8 1/2 years.

How does Thunberg use reasoning in this excerpt?

She moves from a general premise about climate risks to a generalization about solutions.
She moves from a general premise about CO2 usage to a specific prediction about emissions.
She moves from a specific observation about the climate to a general conclusion about CO2.
She moves from a specific pattern in global temperature rise to a generalization about emissions.