Google’s Pixel 10a smartphone, launched in March, contains 36 percent recycled materials, by weight, more than the latest Apple iPhone models. Potential objections and how to address themDesign and engineering concerns about recycled materials range from aesthetics to performance factors. Choosing recycled materials might require changing the thickness of components or tweaking the molds, to accommodate how they respond under stress or temperature changes. Choosing recycled materials might require changing the thickness of components or tweaking the molds, to accommodate how they respond under stress or temperature changes. Devices made with recycled materials must withstand the same drop, heat, chemical-resistance and metal-bonding screens as those made with virgin materials.