Live data from Hacker News

Can We Grow More Food on Less Land?

nytimes.com

31–40 of 287 posts

Re: Can We Grow More Food on Less Land?

#31

What if we all had a green wall with aquaponics ?

I think this is what it has to eventually be. We all have a garden in our garage. We save tons on transportation costs throughout the chain. It has to be near zero work. People used to all have gardens in their backyard but stopped when they could afford the cheap produce at the store.

Re: Can We Grow More Food on Less Land?

#32

Earlier quoted context omitted.

I'm not interested in eating less meat so we can grow the population more. It's not a cost issue. Why do we want a population size that requires people to cut back on quality of life?

Would you eat more chicken instead of beef though? Is there a certain meat you couldn't do without and if so why? I'm not against anyone eating meat (although as an ethical - and hypocritical milk drinking vegetarian - I'd like to see animal suffering reduced) just interested in what meat eaters love about meat.

Chicken and beef have significantly different tastes, textures, and preparation options. They're substitute goods in the same was as a bicycle and a scooter; they provide the same kind of utility, but one may be preferred over the other for reasons that are hard to enumerate and don't really address the utility.

Re: Can We Grow More Food on Less Land?

#33

What would make people eat less beef? Since taxes seem a hard sell, would subsidizing chicken + non-meat protein help? As a vegetarian I'm trying to get my head around what would help change the behaviour of the meat eating HN members.

>“We could imagine a significant shift from beef to chicken, and that by itself goes a long way.” (Poultry production has about one-eighth the climate impact of beef production.)

I think the possible benefits of this approach might be exaggerated. The uniquely "large" environmental impact of beef cattle results from methane emissions, but methane is not the big challenge; land use is. While methane is a potent greenhouse gas, it also has a shorter atmospheric lifetime than CO2/N2O, which, to me, suggests that it should be addressed after the other gases; the impact of a reduction in methane emissions will be felt quickly, and the risk of methane accumulation is lower.

Land use -- with 40% of the world's land devoted to agriculture -- is much more of a problem and I see less indication that it will be addressed by changing the relevant animal. A little, sure, but a lot of the land currently used for pasturing cattle isn't appropriate for chickens anyway, and I'm not convinced that it takes 8x as much land to raise a pound of beef vs. chicken.

Lab-grown meat is/will be a huge net win for the environment and hopefully our wallets, and I think it will be the final compromise on this front, at least for the next few hundred years. A few decades of lead time doesn't bother me for reasons discussed above.

On another front, the densest sources of plant protein after soy are hempseed, lentils and pumpkin seeds. These rarely make it into our diets, though. You need more than mere tax incentives -- the strong flavors of those seeds need to be managed somehow. I made a "curry" with a hemp-milk base once. The only thing that corrected the smell was a lot of Worcestershire sauce. Ironically, it's vegetarians who won't eat fermented anchovies.

Re: Can We Grow More Food on Less Land?

#34

What would make people eat less beef? Since taxes seem a hard sell, would subsidizing chicken + non-meat protein help? As a vegetarian I'm trying to get my head around what would help change the behaviour of the meat eating HN members.

I'm not interested in eating less meat so we can grow the population more. It's not a cost issue. Why do we want a population size that requires people to cut back on quality of life?

Plenty has been written on "the population question". Your intuitions don't agree with my understanding of the state of the art.

Many environmentalists say that even the current world population can't afford Western middle-class quality of life.

Efforts to limit population growth are already in place but it's mostly occurring in parts of the world too poor to do anything about it. We don't "want" higher population but short of some kind of massive neo-colonial invasion there's no way to stop it.

Re: Can We Grow More Food on Less Land?

#35
post #30

What would make people eat less beef? Since taxes seem a hard sell, would subsidizing chicken + non-meat protein help? As a vegetarian I'm trying to get my head around what would help change the behaviour of the meat eating HN members.

I have a mirror-image question: What will it take to convince vegetarians that a meat-based diet is actually the healthiest way to eat, and that meat can be raised in humane, environmentally-friendly ways? :-) Edit: This a serious question. Down voting is hardly a productive form of dialog.

Actual scientific data proving something that's actually scientifically untrue. Every nutritionist suddenly bribed by a the meat lobby to throw out years of data to the contrary. Proof that the animals being made into food are entirely incapable of thought or physical feeling. That would probably cover everyone.

Re: Can We Grow More Food on Less Land?

#36
post #24

Don’t we already know how to do this? For example, the concept of companion planting — growing plants which behave symbiotically together — is a centuries old idea. The issue is whether we have an economic incentive to.

I am not an agronomist, but my instinct is that companion planting interferes with large-scale farming, where machines or poorly paid humans in a hurry need to easy access to a single crop to harvest, and often destroy the field as they work. I'd like to think if the yields were worth it we'd have worked around that, but possibly robotic harvesters can take us there.

And that is the crux of the entire question. You get what you incentivize. Current US Farming practices are extremely incentivized towards singular homogenous products using an absolute minimum of human labor.

Re: Can We Grow More Food on Less Land?

#37
post #8

What would make people eat less beef? Since taxes seem a hard sell, would subsidizing chicken + non-meat protein help? As a vegetarian I'm trying to get my head around what would help change the behaviour of the meat eating HN members.

Continuing to improve artificial meat (e.g. Impossible Burgers) to get to the point where it's better than the real thing. You don't change people's minds by taking things away from them. You give them a better substitute.

Artificial food will always lack the bio-availabilities of real food our bodies evolved to process. For example, vitamin C artificially synthesized from glucose is more difficult to assimilate by the guts than "natural" vitamin C, especially when consumed with carbs.

Re: Can We Grow More Food on Less Land?

#38
post #21

What would make people eat less beef? Since taxes seem a hard sell, would subsidizing chicken + non-meat protein help? As a vegetarian I'm trying to get my head around what would help change the behaviour of the meat eating HN members.

Isn't the meat industry already heavily subsidised?

Just about every segment of food production is heavily subsidized at this point. We're VERY good at producing a tons of food, and we're also very good at transportation at this point, so the only way to keep those people in business is to buy up tons of milk and pour it down the drain or make excess crops into fertilizers to influence price.

Re: Can We Grow More Food on Less Land?

#39
post #30

What would make people eat less beef? Since taxes seem a hard sell, would subsidizing chicken + non-meat protein help? As a vegetarian I'm trying to get my head around what would help change the behaviour of the meat eating HN members.

I have a mirror-image question: What will it take to convince vegetarians that a meat-based diet is actually the healthiest way to eat, and that meat can be raised in humane, environmentally-friendly ways? :-) Edit: This a serious question. Down voting is hardly a productive form of dialog.

Depending on their definition of humane, nothing. To some vegetarians, they don't really care about what the healthiest way to eat is if it comes at the cost of killing animals. So the argument of "oh well it's the healthiest way" doesn't even effect the argument.

I'm sure we could produce more meat, raised in more sustainable ways, but that would involve people taking a major decrease in the amount of meat they eat. Modern levels of meat intake are at their highest levels in history. We can easily afford to lower are intake.

I'm also not a vegetarian, just know quite a few and have been around when the arguments come up.

Re: Can We Grow More Food on Less Land?

#40
post #35
post #30

Earlier quoted context omitted.

I have a mirror-image question: What will it take to convince vegetarians that a meat-based diet is actually the healthiest way to eat, and that meat can be raised in humane, environmentally-friendly ways? :-) Edit: This a serious question. Down voting is hardly a productive form of dialog.

Actual scientific data proving something that's actually scientifically untrue. Every nutritionist suddenly bribed by a the meat lobby to throw out years of data to the contrary. Proof that the animals being made into food are entirely incapable of thought or physical feeling. That would probably cover everyone.

do you mean humans are designed to digest cellulose ? That's news to me...
Post reply on HN