Cool. My local recycling center takes (or took) single stream.
For many years, this was the preferred method. Basically, if it's recyclable, you just separate it from your trash and throw it in the recycling bin. Paper, plastic, glass, metal, all of it in the same bin. And for a long time, it was more economical and cheaper for those involved to sell recyclable materials to china. It was cheaper for china to recycle our trash than to buy the material new.
Until recently. What happened can be chalked up to either politics, or culture. Regardless: China stopped buying our garbage to recycle. The reason they gave was because there was just too much non-recyclable material in the recycling mixed in to be worth sorting it out.
So now, as I understand it: single stream recycling is 'recycled' by simply burning it to power furnaces and boilers.