Collect it, stuff it in a warehouse and then problem solved. Other option is to send it overseas to pollute someone else’s country. Then encourage everyone to consume more stuff, because the economy must have endless growth, or else.
I would be interested to know how they calculated that statistic. The website does have sources listed but it's so small and blurry I can't read it.
Suffice to say I'm very skeptical the figure would be so high and I suspect it's an overestimation.
For example, a lot of cardboards can't be recycled if they are contaminated in some way (ie food containers), and I would suggest a lot of cardboard that gets used is probably contaminated.
a lot of cardboards can’t be recycled if they are contaminated in some way
...and this is where consumer education comes in. I know that my cheese crusted takeaway pizza lid can't be recycled, but the clean bottom half can be.