Snowball sampling in the carbon footprint research of unregistered populations in the Faculty of Science and Technology, Rajamangala University of Technology Suvarnabhumi, Suphanburi Campus

Abstract

          This research studied the snowball sampling of the unregistered population of environmentalists in the faculty of science and technology from the unregistered population in the faculty. It was found that the snowball sampling was appropriate for a small sample size. The selection of a linear snowball sample was suitable for a maximum size of 20 samples, and the non-discriminatory exponential snowball sample was suitable for maximum size of 16 samples. Carbon footprint emission in the faculty of science and technology was divided into 3 scopes: scope 1, the direct carbon footprint emissions, i.e. traveling to the university (9,312.21 kg CO₂e/unit), scope 2, the indirect carbon footprint emissions, i.e. electricity and water consumptions in the faculty (47,768.28 and 176.26 kg CO₂e/unit, respectively), and scope 3, the other carbon footprint emissions, such as paper usage, plastic water bottles and paper usage in the faculty (1,132.98, 1,589.86 and 13,504.54 kg CO₂e/unit, respectively). In conclusion, the highest emissions of carbon footprint per year of the faculty was the electricity and water usage. Therefore, carbon footprint should be reduced by converting electricity to solar energy, the use of solar cell and incandescent lamps UV and emit less heat, to save electricity costs and to perform a save water campaign in the faculty. In addition, there should be a campaign for planting a tree in the faculty to absorb 9-15 kilograms of carbon dioxide on average. The goal will be set to reduce carbon footprint to zero or net zero by 2 people in the university reduce the temperature as 2-4 degrees Celsius and control the temperature not to rise, as well as expanding the conservative units.