Mining stocks raised very high and often overvalued right now, because of the current high prices on commodities.
Recycling seems not be in focus of most investors (since mining is the more traditional inflation protection...), since recycling is a newer market to gain commodities and overlooked (espacially by the common ETF investors).
Biffa is a growing recycling company in great britain, which may also have good outlook, to benefit from brexit (since importing from EU may be more expansiv than recycling).