What is..........
Cotton is a natural fiber harvested from the cotton plant.(Biodegradable)
Environmental
impact 
Jute is a type of plant
fiber (Biodegradable)Environmental
impact
get the full story - http://en.wikipedia.org/wiki/Jute
Coated Jute/Hessian/Burlap: The process of manufacturing biodegradable polymers and other man made coatings is a relatively knew concept and not yet used by the majority of hessian/jute/burlap cloth manufacturers. Unless you are sure that the coating on the Jute/Hessian/Burlap bag is biodegradable and not harmful to birds and rodents when ingested, it is advisable to use uncoated Jute/Hessian/Burlap. Most manufacturers of Jute/Hessian/Burlap cloth and bags do use acid free eco friendly ink for printing.
is polyester that originated from a mixture of coal, air, water, and petroleum which is formed from a chemical reaction between an acid and alcohol. Polar Fleece is predominantly produced from recycled plastic bottles.
Environmental
impact
Polyester (in polycotton)?
Polyester (in polycotton) is one of the synthetic fibers that originated from a mixture of coal, air, water, and petroleum which is formed from a chemical reaction between an acid and alcohol.
Environmental
impact
Polypropylene is a plastic
polymer,
of the chemical designation C3H6 Environmental impact 