Good luck convincing the U.S. to stop eating meat or even less meat. Want to start a war? because that's how you start one. I'm all for stopping and even reversing climate change but changing meat consumption just isn't going to happen. I could see giant green house gas capture systems on all factory farms before meat consumption changes.

From the abstract of the Nature article this article cites:
"We analyse several options for reducing the environmental effects of the food system, including dietary changes towards healthier, more plant-based diets, improvements in technologies and management, and reductions in food loss and waste. We find that no single measure is enough to keep these effects within all planetary boundaries simultaneously, and that a synergistic combination of measures will be needed to sufficiently mitigate the projected increase in environmental pressures."

So it isn't a study purely about reducing meat intake. Quite the contrary.

I also find percentages in this regard are not helpful. Hard numbers of actual amounts is much more useful. As a practical matter, and let's face reality, asking people to give up meat entirely isn't realistic. Asking everyone to reduce to a certain level is more realistic, but that requires actual amounts, not percentages.

Also use less coal,oil and more sun, wind and water.

So many people can't seem to let go the idea that they need/want/deserve it every day.