Air Minum Isi Ulang (AMIU) merupakan alternatif untuk memenuhi kebutuhan air bersih untuk dikonsumsi. AMIU yang layak dikonsumsi harus memenuhi standar baku yang telah ditetapkan oleh Permenkes RI nomor492/Menkes/IV/2010. Penelitian ini bertujuan untuk menguji kualitas air minum isi ulang baik secara fisik, kimia dan biologi di sekitar kampus FKIP Universitas Labuhanbatu. Penelitian ini merupakan penelitian kualitatif deskriptif dengan melakukan uji organoleptik terhadap 30 panelis (parameter bau dan rasa) dan kuantitatif deskriptif   untuk parameter suhu, TDS, pH, kadar logam berat dan total coliform. Uji kuantitatif dilakukan di laboratorium dengan mengambil 10 sampel AMIU secara purposive sampling dimana masing-masing sampel dianalisis dengan 3 kali pengulangan. Hasil penelitian menunjukkan bahwa seluruh sampel AMIU untuk parameter fisik dan kimia memenuhi standar baku mutu yang telah ditetapkan oleh Permenkes RI nomor492/Menkes/IV/2010. Seluruh sampel tidak memiliki bau dan rasa, suhu berkisar 24,2 – 27,4oC, TDS berada dikisaran 20-150 mg/L, berkisar antara 6,8 - 7,3, Fe 0,000-0,120 ; Mn 0,000 - 0,201 ; Cd 0,000 - 0,003 ; Cu 0,001 - 0,095 ; Cr 0,000 - 0,003. Parameter biologi yang diuji yaitu 3 sampel memenuhi syarat dan 1 sampel AMIU diketahui mengandung bakteri E.coli serta 6 sampel AMIU lainnya mengandung bakteri coliform.

Green chemistry is known as a study that aims to reduce or eliminate the adverse effects of the use of hazardous chemicals that can damagethe environment and health. Environmental damage and poor health as caused by hazardous chemicals will affect the issuance of costs. This present study aims to discuss green chemistry and its impact on the economy through a literature review. This study is a review article that explains the conceptof green chemistry and its impact on the economy. Based on the results of the study showed that the implementation of green chemistry will reduce thecost of recovery, prevention, and also reduce health costs. It is recommended that the firms in conducting manufacturing activities adopt green chemistryin their manufacturing activities

Oil palm (Elaeis guineensis jacq.), is a vegetable oil-producing plant, which cannot be separated from the attack of caterpillars that eat oil palm leaves which can cause a decrease in plant production. The purpose of this study was to determine the attack rate of bagworm (Metisa plana) and how to control it, on each oil palm plant block at PT. Umada Pernantian "A", Kec. Marbau, North Labuhan Batu Regency. The method used in this research is descriptive method by collecting primary data and secondary data. Primary data is the result of observations in the field with a pest census using a descriptive method. Secondary data is data from the previous pest census in the company. The highest attack rate of Metisa plana was found in block I and block II with an incidence of 18% in block I and 8% in block II, the number of pests in block I was 27,336, and 18,480 in block II, which was >5 tails / midrib with weight category. The lowest Metisa plana attack rate was found in block III and block V where the percentage of bagworm attacks in block III: 0.08% and in block V: 0.11%, the number of pests in block III: 23 tails and block V: 26 tails, with an attack rate of <2 bagworms per midrib. After chemical control was carried out in blocks I and II, the percentage of attacks in block I: 0.43% and block II: 0.34%, the number of pests in block I: 100 and 70 in block II, the attack rate in block I and II were being <2 tails/midrib in the light category