Indoor farms only work for greens and veggies, not for calorie crops. It's hard to beat free sunlight. Rooftops are not sufficient area, difficult to access and also compete for space with PV.

> There isn't net deforestation globally, though.

That would be news to me, afaik this is just a goal and hasn't been achieved yet. And as far as carbon footprint goes net zero deforestation still can release carbon overall since new forests won't be as good a carbon store as old growth forest is for a long time.

> lab grown meat

That may be useful from an ethical point of view, but has anyone shown that this can be done with a lower GHG footprint? After all those cell cultures need to be supplied with nutrients too.

If you want meat then switching from bovines to chicken is a thing you can do today. Chicken doesn't release methane, has a lower overall land and carbon footprint. Still less efficient than staple crops of course.