That is the conclusion of a study conducted by Mercer Human Resource Consulting Society, published in London. The study, which examined the effects of pollution on cities around the world, took into account such factors as air quality, waste treatment, safety, housing, education, transportation, and public services.
जर्मनीतील बॉन विद्यापीठातील उपयोजित भौतिकशास्त्र संस्थेतील संशोधकांनी लेसरवर चालणारे मायक्रोफोन निर्माण केले आहेत जे झाडांचे बोलणे “ऐकू ” शकतात.