Answers
Water supplies becoming contaminated
Copper from cables
Sell or donate working devices
Steel from metal frames
Land spoiled by scrap metal yards
Buy refurbished rather than new
Gold from circuit boards
Toxic metals left in the ground
Take old equipment to a recycling centre
Repair broken devices instead of replacing
Wildlife poisoned by leaked chemicals
Silver from electrical contacts
Aluminium from device cases
Keep devices for longer before replacing
Poisonous fumes from burning cables