Two news stories this week — one that made headlines, and one that got less attention — point to the fiendish difficulty of reinventing agriculture to reduce its heavy toll on the climate.

The first development: The New York attorney general Letitia James, fresh off a $450 million civil verdict against Donald Trump, announced a lawsuit against JBS, the world’s biggest meatpacking company, for making misleading statements about its efforts to reduce greenhouse gas emissions.

James’s lawsuit said that JBS has “used greenwashing and misleading statements to capitalize on consumers’ increasing desire to make environmentally friendly choices,” with statements such as: “Agriculture can be part of the climate solution. Bacon, chicken wings, and steak with net zero emissions. It’s possible.”

The lawsuit cited David Gelles’s interview with Gilberto Tomazoni, the chief executive of JBS, at our Climate Forward event in September in which he said: “We pledge to be net zero in 2040.”

James argues the company can’t possibly achieve net zero “because there are no proven agricultural practices to reduce its greenhouse gas emissions” at the company’s vast scale, at least without costly efforts to offset its emissions.

JBS is a gigantic company, but the issues raised in the lawsuit against its U.S. arm are even fundamental: Is there even a path to net zero agriculture, especially if people are determined to keep large quantities of meat in their diets?