This document discusses strategies for creating an energy efficient and eco-friendly building. It outlines the use of sustainable building materials like fly ash bricks and concrete, which reduce emissions and energy usage compared to traditional materials. Rainwater harvesting, vermicomposting, solar energy, and drip irrigation are presented as techniques for conserving water and producing renewable energy and fertilizer. The conclusion emphasizes that adopting these strategies can result in significant cost savings over the lifetime of the building, as well as increased comfort, health, and sustainability.