An article about waste, its types, and disposal methods. It provides information on household waste, hazardous waste, medical waste, e-waste, recyclable waste, construction debris, and green waste.
This book provides information about light and sound. It explains the basic qualities of light and describes how it can be detected by the human eye. It also discusses the concept of sound waves and how they travel through different mediums. The book is suitable for children who want to learn more about light and sound.