I think it's an error and they meant 70 million. https://earthweb.com/sign-language-users/ https://earthweb.com/sign-language-users/ "Roughly 70 million heari

I think it's an error and they meant 70 million. https://earthweb.com/sign-language-users/ https://earthweb.com/sign-language-users/ "Roughly 70 million hearing-impaired and deaf people all over the globe use sign language to communicate."