There's a difference between telling people what to eat and incentivizing things that give off a lot of greenhouse gases. With automobiles, the governments are

There's a difference between telling people what to eat and incentivizing things that give off a lot of greenhouse gases. With automobiles, the governments are trying to incentivize greener solutions. With food, things like subsidies incentivize processes that give off a lot of greenhouse gases. Should the government incentivize differently for food than for cars? By incentives I mean things like subsidies. Tax dollars. What makes cars different from the food supply chain when tax dollars are being spent on subsidies?