You could try: There is rising concern that, In recent times, there is great concern

Well, I think I can help you with this matter! There are some options which you could use, for example: ''Recently, there has been quite a concern about...'' ''Recently, there has been a great concern about...'' ''Recently, there has been too/so much concern about...'' Tell me more about what you wish to write, so that I can help you in a more detailed way!