Green buildings are designed to reduce environmental impact through efficient energy, water and resource use as well as waste reduction. They provide healthier spaces for occupants compared to conventional buildings. Green building techniques include erosion prevention, rainwater harvesting, solar energy, landscape design for heat reduction, water recycling, and efficient energy practices. The objectives are to use resources efficiently and reduce waste, pollution and environmental degradation. Some benefits include energy and cost savings, improved indoor air quality, water efficiency, and healthier lifestyles. However, initial costs are higher and specialized materials and skills are needed.