I’m very worried about heavy metals, plastics, and chemicals too much to eat any seafood.
Seafood is very healthy, the populations that eat a lot of seafood are very healthy, the stories about heavy metals or plastics are blown out of proportion and the toxicity claims is not supported by evidence.
I'm actually far more concerned about the preservation of wild life, with wild fish populations (such as tuna) going down due to over-consumption. I actually seek farmed fish — the omega 3 content might be lower, but the benefits of omega 3 are probably overblown too.
So there might actually be some benefits to the fearmongering, even if irrational ¯\_(ツ)_/¯
I could see this being a possibility for many Asian countries, but I'm skeptical that this would be true for the US and Europe. Do you have any sources?
Regardless of the effects of CO2, that's quite possibly the most inaccurate and unscientific argument I've ever heard on this subject. Humans breathing has never caused an excessive amount of CO2, so drawing any relation of our byproducts to the effects of CO2 generated from manufacturing, energy and transportation industries is absurd.
"human excrements have a net null effect on global warming, as they are offset by carbon fixation in photosynthesis. As a result, they do not contribute to increasing the concentration of CO2 in the atmosphere."
https://www.sciencedaily.com/releases/2010/11/101102131108.h...
To humor you, I'll also show why your attempt at a second argument to be incorrect, regarding what constitutes pollution
>Pollution: “the introduction of harmful substances or products into the environment.”
I'll just assume you have a misunderstanding what pollution is rather than you purposely omitting details. Pollution can be literally anything introduced that changes the environment: "Pollution can take the form of chemical substances or energy, such as noise, heat or light"[1]. Were you aware of light pollution[2] and noise pollution[3]? We've already established that there is an imbalance of CO2 voume created by many large industries. If noise and light can have polluting affects, why can't CO2?
[1] https://en.wikipedia.org/wiki/Pollution
(For any readers who haven’t tried a great sardine, look for Matiz, La Gondola, any Portuguese brand, or in France, Rödel.)
The article does mention that smaller fish often found canned are lower in the food chain and thus have less mercury, but I would think that you'd have to look carefully at each species, and the sourcing, and the packaging before you could really say the health benefits are worth it.
The author goes into lot of detail.
TLDR 1. Eat small fish like Sardines, Mackerel, Anchovies etc
2. Get your omega 3 index
3. Make sure your omega 3 to omega 6 is good
There's a lot of options -- salmon (I personally have salmon sushi at least twice a week), omega-3 supplements, a dozen other healthy foods.