For instance, most apparel factories use non-organic cotton which requires more water and pesticides during cultivation compared to organic fibers; fabrics derived from oil-based polyester require massive amounts of energy to manufacture; hazardous chemicals are also used in mass quantities during processing stages such as dyeing fabric colors; waste created through overproduction then ends up landfills where it takes decades - if not centuries - to decompose completely; lastly transportation involved transporting clothes around the world increases emissions into our atmosphere significantly.