| | | Paris. London. New York. Our global cities are synonymous with innovation and all things cutting edge – yet as some of the world's worst polluters, they're far from future-proof when it comes to climate change. But can our busy urban centers really go green? From zero-waste restaurants to eco-friendly architecture, here's how eight cities are leading the way. |
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|  | | The revival of the sleeper train | | A few years ago, sleeper trains were said to be dying out – made redundant by high-speed trains and cheap flights. But in this environmentally aware era the overnight train journey is staging a welcome comeback, especially in its European heartland. | | | | |
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| |  | | Greeting customs from around the world (and how to do them properly) | | We may be bumping elbows and waving hello from afar, but greetings around the world are often more involved than that, even in non-pandemic times. From bowing in Asia to rubbing noses in the Middle East to cheek kisses across the globe, here are a few customary greetings from around the world. | | | | |
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