Alternatively, there are now biodegradable plastics on the market which begin to decompose upon being exposed to sunlight. This plastic can be used to make envelopes that are usually used for bulk mailing or to carry smaller items.Biodegradable plastic provides a sturdy alternative to traditional plastics – and as plastic is one of the most common materials which resonates with consumers as being incredibly damaging for the environment – highlighting your company’s use of alternatives is a strong way to boost customer loyalty and retention.