The explanation of the green-chemistry tag says
Green chemistry, also known as sustainable chemistry, is a philosophy intended to reduce the environmental impact of chemical industry and research.
But I'm a bit puzzled by the description of the sustainability tag:
For questions dealing with sustainable living, including questions about better fuels, pollution reduction, CO2 capture and recycling (CCR), the chemistry of photovoltaics, photochemical splitting of water, catalysts for hydrolysis of water and other routes to hydrogen generation.
The confusing words here are 'sustainable living'. Sustainable Living is an entirely different topic that has it's own StackExchange website. Could it be that the author meant to say 'sustainable chemistry'?
If so, shouldn't the sustainability and green-chemistry tags be merged?