Guardian sustainable business

This $500 shirt changes color when exposed to air pollution – but who does it help?

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A NYC-based designer says he wants to make people pay more attention to the environment. But at these prices, is this more art than activism?

Would you wear wool shoes to save the environment?

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As demand for all-wool shoes grows, a number of US footwear brands are heading directly to the source: the sheep pastures of New Zealand

Lab-grown leather is coming, but is the industry ready for it?

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A startup, Modern Meadow, is attempting to develop a biomaterial alternative to leather as prices rise. Will it succeed – and will it have a market?

Natural dyes v synthetic: which is more sustainable?

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Colours derived from plants may appear more planet-friendly than man-made dyes, but the case isn’t clear-cut

What the experts say: how to make our cities more sustainable

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Catch-up on the highlights from our recent panel discussion on sustainable cities, including why it is a myth that Spaniards don’t cycle