How are plastic bags made?

What are trash bags made of? is it the same as plastic bags from walmart?

• talking to some lady on the internet and she is telling me that to save the world you need to use cloth bags not the plastic bags you get at like walmart. but i use them for the trash cans in the bathroom and living room and it saves me money. so is the plastic bags the same as trash bags? are they made out of the same stuff? can you give a site that says this. or i use them for yard sales we have and sometimes use the paper bags too.

• Answer:

  Hollie your trash bags are made from byproduct of oil.