There are currently 500 communities on lemmygrad. And that would also require me to keep up with any new communities that are created to block them as well. And does nothing for blocking comments.
Sure, but I'd like to be able to filter by all as well on occasion to see what the rest of the community is talking about in much the same way that on reddit I sometimes only look at my subscribed subreddits but sometimes use r/popular.
And as you say it won't help with comments and from what I can tell after even a short time here, it isn't uncommon to see lemmygrad users in comments on lemmy.ml so even if I were to only use local/subscribed I would still see content that I don't want to see by staying here. That could potentially be a temporary solution but clearly means that lemmy.ml is not the right instance for me. I think I might rather just leave Lemmy altogether until there is more adoption and therefore somewhere that suits me better.
How are you supposed to know which instances are blocking which other instances? When I go to join-lemmy.org it doesn't give me any information like that and even going to the instance doesn't seem to that I can see.
I think the numbers might surprise you. This is where the original graphic came from and contains much more information on the topic. More developed countries especially tend to use far more land for agriculture due to their larger animal agriculture industries (by both percentage of our total agricultural land use and absolute size of our animal agriculture industry compared to less developed countries). Even the land that is used to grow crops is mostly there so that we have something to feed the literal billions of animals we kill per year in the US alone. Even with more efficient land use and farming techniques the sheer scale of our animal agriculture industry vastly outweighs whatever inefficiency is involved in things like what you are describing. And as the chart near the bottom shows, despite our increases in efficiency with the abhorrent practices of factory farming, producing 100 grams of protein in the form of beef for example is far far far more inefficient still. And that's not even taking into account things like how much water it takes to produce that protein, the effect on the ecosystem, the ethical implications, the effect on the climate, etc.