Tofu is one of Indonesian traditional foods that is produced mostly by small medium scale industry. It is indicated by low production scale, inefficient in using production material and energy during the process. Baturetno village in Bantul district is center of tofu industries in Yogyakarta Province and is facing common problem such as lack of knowledge, inefficient using energy, using human labour, and no appropriate technology applied. This study is aimed to apply Life Cycle Assessment (LCA) for evaluating the process, waste and emission released to environment and is focused on Global Warming Potential (GWP). The LCA gate-to-gate was applied in a small-scale tofu industry, which had one worker, a production capacity 50 kg soybean/day, 6 working stations and used wood and electricity. For producing 1 kg fresh tofu it was needed energy from human, fuel, wood and electricity were needed for producing 1 kg fresh tofu 1.5269 MJ/kg and produced pollutant contributed as global warming potential of CO2, NOx, CO and CH4 totally 0.1766 kg CO2-equivalent.

Besole area, Tulungagung regency, East Java province is an area with measured marble resource potential of 15 million tons. This study aims to determine marble recommendations based on their characteristics. Marble characteristic has brownish white-brown description of megascopis, non-foliated structure, based on fracture density measurement using inventory method, marble has medium density, based on petrographic analysis, marble has crystal size ≤ 0.5 - 2 mm, having texture of metamorphism process resistance ie crystalloblastic and relict, texture of mineral form that is granoblastic, texture of metamorphic rock is decussate and saccharoidal. The composition of marble consists of calcite, dolomite and hematite. Based on analysis of geochemical test using method of ICP-AES (Inductively Coupled Plasma - Atomic Emission Spectroscopy), marble has the main oxide content dominated by CaO 54.6% - 56%, based on the analysis of engineering test yields the average value of compressive strength test of 781,713 kg / cm², wear resistance value 0.0399 mm / min and water absorption value 0.704%. The recommended use of marble based on solid density is utilized as a residential floor with a size of ≤10-40 cm, based on its geochemistry used as paper industry, textile dye, pesticide production, sugar screening and cement production, and based on its technique is used as floor with live load> 250 kg / cm², inner and outer construction stone, and light - medium construction foundation