Introducing Parkhuisje 3: A Green Nudge for Cleaner Parks

This Dutch reciprocity intervention offers a simple trade-off: easy meal ordering and delivery in exchange for a cleaner park.

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The Rooftop Character That’s Unlocking Rooftop Solar for Renters

German energy brand Karlssonn uses an ‘emotional shortcut’ that makes rooftop solar feel simple — giving tenants energy they can truly own.

 

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