no
no
NO!
Years.
no
Safe - quite probably Tasty - probably not.
Discolored aluminum cookware is generally safe to use, as the discoloration is usually just a cosmetic issue and does not affect the safety of the cookware. However, if the cookware is heavily discolored or shows signs of damage, it may be best to replace it to ensure food safety.
Microbiologically, it would be safe. Palatability is another question.
Most fish will remain safe to eat for up to six months. Fish that are fatty, such as salmon and tuna should keep for 2-3 months when frozen. Fish that are lean, such as cod and catfish will keep for up to 6 months when frozen. It would not be safe to eat fish that was frozen for 2 years because it would most likely be spoiled and could cause food poisoning.
Discolored aluminum pans are generally safe to use for cooking. The discoloration is usually caused by normal wear and tear and does not affect the safety of the pan. However, if the pan is heavily discolored or has scratches or pits, it may be best to replace it to avoid any potential health risks.
If it's a deep freeze and was OK when you put it in, it would be edible even after several years.
Assuming it has remained constantly frozen for the three years hamburger is probably safe to eat. But, it may or may not taste good.
yes