Some of the sustainable practices at Orto Restaurant Singapore Includes Planting trees: The restaurant is very conscious of environmental change. For improving air quality, they have planted more than one hundred trees on their farm. Using energy-efficient appliances: In order to reduce energy consumption, they use energy-efficient appliances, like heat pumps and LED lights. Composting: They compost all of their food waste which helps to lessen the amount of waste sent to landfills. Reusing water: They collects rainwater and then use it in their farms.