문장 분석좀 부탁드릴게요! ( 1번질문에 where 부분과 2번 질문의 what,where 이 있는 부분의 해석도 알려주시면 감사드리겠습니다.. 이상하게 잘 안되네요..)

1. where wood is harvested and then transported halfway across the globe, the associated energy costs are high, causing a negative impact on the environment.2. what is more, where wood is treated with chemicals to improve fire- and pest-resistance, its healthful properties are compromised