Poly bag indirectly can cause it. It causes littering too.
A poly bag is a type of bag made of thin, flexible plastic. The purpose of using a poly bag is very simple. The purpose of using a poly bag is to hold items.
Flat poly bags are a great way to keep all of your sewing material together. Its a good idea to keep all of your needles together in one bag as not to accidently prick yourself.
Both poly bag pro and slideshare have information about poly bags for kids. For purchasing poly bags for kids Ebay is a great place to go. They have all types of poly bags for kids.
poly bags are just plastic bags and their mil size is the thickness of the bag, check out http://www.millersupplyinc.com/ for more info
The best Fabric to use for making a Messenger Bag is Cotton or Poly Cotton Blend. Denim is also a good material but it is more difficult to sew together.
Depends what is the material in bag.
A bag that will retain heat needs to be a good insulator of heat. Clear poly bags aren't good enough at insulating heat to keep food hot for very long.
To calculate the grams per square meter (GSM) for a poly bag, first measure the weight of the bag in grams. Next, determine the surface area of the bag in square meters by multiplying its length by its width (and accounting for any additional dimensions if it's not flat). Finally, divide the weight by the surface area to get the GSM: ( \text{GSM} = \frac{\text{Weight (g)}}{\text{Area (m}^2\text{)}} ).
Depends what material in 2 pound bag
plastic bag
The material that gives the best protection for a camera bag is one that incorporates foam and is treated to be water resistant.
The piece of material at the bottom of a bag that joins the front and back together is called a gusset. It adds depth to the bag, allowing it to hold more items.