We live in a multi-storey apartment block with a shared set of bins, and while I have a rough understanding of the colour coding system (green = garden, yellow = recycling, red = everything else?) ...

Upgrading biogas to valuable solid carbon can potentially lead to negative CO 2 emissions with long-term carbon storage but faces substantial thermodynamic and kinetic limits using a single reactor.

Topaz actually has an exceptionally wide color range that, besides brown, includes various tones and saturations of blue, green, yellow, orange, red, pink, and purple. Colorless topaz is plentiful, ...