1. Smart Waste Sorter System Waste management and its disposal is one of the greatest challenges faced by the world today. It is of vital concern to manage the municipal waste. By effective handling of waste material and by proper recycling, a country can progress in the right direction. In this work, a smart waste sorting machine is developed. It can sort out a variety of waste materials like metal, glass, etc. by using an electro-mechanical system. Conventional sensors are used for sorting out metal and glass and for paper and plastic, LASER and LDR is used. By using this sorting procedure and with proper recycling, the problem of waste management will be solved to some extent. This smart system will, thus help to properly dispose waste and avoids any environmental problems. 2. Water Filtration System Installing an advanced water filtration system has an abundance of benefits. From better health and wellness to a cleaner home, cleaner water can impact the entire household. Not only do water filtration systems produce healthier water than tap water, but they are also much more cost-effective than bottled water. 3. Air Quality Information System Air quality is not same everywhere and it is different by geographic pattern and weather conditions along with sources of air pollution contributes towards the quality of air. This is why different areas have different air quality levels at different time. Example: Let’s consider two areas: 1. Area having low air exchange rate and less sources of air pollution 2. Area having high air exchange rate and less sources of air pollution The first area will have a poor air quality than second area and why is that? This is because, the first area has low air exchange rate, which makes the pollutants to build up in that area and In second area, the air exchange rate is high which doesn’t allow the pollutants to build up in that particular area. 4. Automatic Street Light