Entries remain active for a year and half. This is very effective. In areas that accept mixed paper, most junk mail can be recycled. Due to new technology, plastic window envelopes and staples are ok in many communities. Even though junk mail can often be recycled, recycling is second best to reducing need 1 .
Much junk mail uses virgin paper, often of types with poor recycling value and toxic inks.
Recycling itself takes energy and resources and has its own impacts on the environment. Reduction, where possible, is the far better choice. Remember that they just interrupted you. If the same people call back, they are violating the law. Telemarketing Sales Rule .