Manure firing with no requirement for a kiln has made this zero
technology approach available anywhere it is needed
这句话中anywhere it is needed 是状语从句吗？... has made ... available
anywhere it is needed.
前面没什么问题，主要是后面。我的理解是：available是宾补，anywhere it is
needed是状语从句。但是anywhere和it之间为什么不需要连接词that？
