This document summarizes a student project on greenhouses. It defines a greenhouse as a building where plants are grown, ranging in size from small sheds to large industrial structures. It then lists advantages of greenhouses such as maintaining water balance and increasing rainfall in some areas. Disadvantages include increased human and animal diseases and extinction of species due to loss of habitats. Sources of greenhouse gases are identified as industry, transportation, nuclear tests, and open burning. Effects include changes to geomorphology, the atmospheric and hydrological systems, and ecology. Solutions proposed are planting more trees, reducing fuel burning and improving vehicle emissions controls, and setting industrial emission standards.