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0Light pollution / is the artificial light / that is unwanted or unnecessary. // It has become a global issue. // At present, / more than 80 percent / of the world's population / live under light-polluted skies. //
Light pollution can do harm to both humans and animals. // Lighting at night / interrupts people's sleep, / causing headaches, stress / and other problems. // It causes birds in the city / to become active much earlier / than birds in natural areas. // Even animals / living under the sea / may be affected / by underwater artificial lighting. //
We can take action / to reduce light pollution / and bring back the natural night sky. // Governments can adopt laws / to preserve the dark sky. // Factories can produce efficient light sources / that reduce light pollution. // Individuals are encouraged / to use outdoor lighting / only when and where / it is needed. //
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