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...et al., 2022). The consequence of population growth and human development also pitches housing and food production into conflict, with agricultural land and watersheds being subsumed into large tracts of new housing as cities expand. Cities and mega-cities of the world already have ecological footprints vastly larger than their land areas (Steele, 2020). Housing means...

...produce new adsorbent materials to recover valuable metals from waste streams (Chaves et al., 2022). This has the benefit of reducing the need for future mining and the environmental impacts associated with it, such as deforestation, contamination of soils, pollution of local waterways, an increase in noise level and dust as well as the formation of spoil heaps. [Figure gives a summary of critical raw materials lists ......

...axes to grind. You will appreciate, however, that those values are difficult to assess. It is sometimes hard to distinguish opinions from values (think of debates on abortion or the ‘right-to-die’), and there are methodological difficulties in measuring how and to what extent people's values change over time. As you read through the next two subsections which describe...