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I agree. And in this field, the raw material is practically free. It's a growing part of the economy with plenty of room for progress. I found some interesting charts.
World maps of waste generation, type, and treatment, 2015 and 2050. National per capita generation values (kg) in greyscale shading, whereas bar charts show total production of waste types and treatments presented for regionally representative countries and regions (in the case of the EU). Bar chart values are in terms of the total amount of waste generated (Mt) for the country/region.
I expect landfill mining to become a big industry at some point.
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