What happens to a drink can after it goes in the bin?
The amount spent by councils on landfill has fallen by 23% in the last four years, according to figures obtained by BBC Wales.
The total weight of landfill has dropped from 641,000 tonnes in 2012/13 to 450,000 tonnes in 2014/15 - a 30% fall in three years.
Since, 2011/12, the annual cost has dropped from more than £59m to £46m.
The Welsh government said Wales was "continuing to lead the way in the UK".
But what happens to a piece of recyclable waste - say, an aluminium can - after it goes in the wrong bin? BBC Wales went to Denbighshire to find out.
21 Jan 2016