Scientists have developed a new method to identify and map plastic waste in urban areas using satellite imagery, offering new hope for tracking pollution and improving waste management in cities worldwide. The team of researchers led by Elena Aguilar from the San Diego State University, discovered that common plastic materials have unique "fingerprints" when viewed through special infrared light sensors. Just as different materials reflect sunlight differently to our eyes, plastics reflect infrared light in distinctive patterns that satellites can detect. The WorldView-3 satellite, orbiting high above Earth, captures these invisible signatures with remarkable precision, down to areas as small as 4 meters across. This breakthrough could revolutionise how we monitor urban waste, particularly in areas where traditional ground based surveys are difficult or dangerous to conduct.