Anything that breaks down over time can be added to the pile. Plastics, glass, rocks, metals and large bones, won't break down very well, so they should be avoided. Anything that rots can be added.
I've added a link to this that has wonderful information about composting.
All should be avoided except talking.
parral error should be avoided cause it can cause a disaster
Hazards
what yoga exercise should be avoided if prone to retinal decatchment?
Any plastic shutters should be avoided in favor of wood ones.
Several practices that should be avoided in the workplace:Unsafe practicesViolation of company policyBullyingIllegal activityFishing from the company pierHorseplaySleeping
Macadamia nuts and walnuts are toxic to cats and should be avoided in their diet.
For optimal composting results, you should turn your compost tumbler every 2-3 days to aerate the compost and speed up the decomposition process.
Foods that are crunchy should be avoided to minimize the risk of breaking the appliance.
Many foods have to be avoided when switching to a gluten free diet. Any form of wheat must be taken out of one's diet, along with oats, barley, rye and anything containing flour. Plenty of fruits, vegetables should be added, along with unprocessed meats and rice flour.
Actually, they souldn't be avoided. They need new homes.