Climate change gets personal when the questions get specific. In the second half of this Climate Versa conversation, Ned Comar pushes Betsy Rosenberg and Charles Rotter past the talking points and onto the hardest questions of all: how much of the warming is ours, what the extreme-weather record really shows, and what happens if either side turns out to be wrong.

After a short break, Ned tries to steer toward a close by asking each guest what still needs to be said. Instead, the conversation goes deeper. Betsy wants to know whether Charles accepts the basics of human-caused climate change at all. Charles answers directly, then takes aim at the evidence for worsening extreme weather, the alarm over a collapsing Atlantic current, and the high-emissions scenario behind decades of climate projections.

* Charles puts a number on it: the climate changes, humans have an impact, and he estimates human activity explains 20 to 30 percent of recent warming at most

* A sharp clash over extreme weather, from Bay Area wildfires and winds to a 123°F day in Palm Springs

* Opposing views on AMOC, the Atlantic current some scientists warn could reach a tipping point, and whether the data can support that fear

* A pointed question for both guests: would you feel guilty if you turned out to be wrong? It sparks a debate over hunger, crop losses, energy costs, and the biofuel-driven food price spikes of 2007 and 2008

* The IPCC's move away from RCP 8.5, why Betsy and Charles draw opposite conclusions from it, and Ned's challenge to Betsy to interview Roger Pielke Jr.

Betsy says the damage is already here, in failing crops, rising grocery prices, fires, floods, and hurricanes, and that caution is the responsible bet when some changes can't be reversed. Charles says the record shows nothing outside natural variability, that AMOC alarm rests on thin data, and that the retreat from RCP 8.5 shows how much of the emergency was built on a scenario that was never plausible. Ned keeps pulling them back to the question in front of them, and asks whether today's climate fears echo the overpopulation warnings he grew up with.

If you want to hear what happens when two people who rarely share a room stop circling and take on the specifics, this half delivers. It's tense, frank, and a rare chance to hear both sides make their case on the same questions, one after the other.

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