????had been operated by amateurs.|When Herrold in no way claimed the creation of radio itself, he did assert the invention of broadcasting to a broad audience, in the use of antennas built to radiate signals in all Instructions.|Radio broadcasting (experimentally from 1906, commercially from 1920); audio alerts sent from the air as radio waves fro… Read More

and cultural value, and as urbanization progresses, our country's unique village forests are disappearing or being damaged. I discuss whether there is a need to restore village forests in the current era.The importance of the natural environment and the need for ecological conservation The natural environment serves as a foundation for humans and l… Read More