What type of items are primarily removed by magnetic separation in the processing of MSW?

Magnetic separation is an effective method used in the processing of municipal solid waste (MSW) to extract ferrous materials, primarily elements that contain iron. Among the provided options, food cans are typically made from ferrous materials, making them highly suitable for magnetic separation. When MSW is processed, a magnetic separator can easily identify and attract these metal items, allowing for their efficient removal from the waste stream.

In contrast, plastic bottles, paper products, and yard waste do not possess magnetic properties, which means they cannot be effectively separated using magnetic methods. Thus, food cans stand out as the primary items that are removable through this technique in the processing of MSW. This distinction highlights the importance of utilizing magnetic separation in recycling programs to enhance the sustainability and efficiency of waste management practices.