商品/貨物從外地入口香港要不要給入口稅

1. Unable to determine.

Environmental-friendly is not really a term used for duty purpose. For example, recycled paper will be still under paper category.

In other word - it can't be answered because you did not say what it is.

2. Hong Kong Customs and Excise Department, as they are responsible for collecting duties:

http://www.customs.gov.hk/tc/cargo_clearance/declaration/charges/index.html

還有汽車，化妝品等要進口稅，如果涉及戰略物品要申請進口證，象牙，珍禽異獸，及受保護動植物及或標本皆不能入口。

香港是自由貿易港，一般而言，進口香港特區的貨品都毋需繳稅，除了酒類、煙草、碳氫油及甲醇。