20 Smart Inventions Our World Has Been Crying For

The 21st century is already so full of witty, smart inventions that it seems no one could think of anything better. At the same time, ordinary things that we use every day are not always 100% convenient. For example, there are traffic lights that spare too little time for pedestrians to cross, making it difficult for elderly folks to cross the road. Singapore has solved this issue by equipping traffic lights with special scanners where seniors can use ID cards to prolong alotted crossing times.
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