Urgent! How did ai get this retro effect like a newspaper?

This method of making black and white particles can only be done with the effect of "color halftone" in AI, but it is still difficult to make the same mesh as the original picture. Because the setting of moire angle is different, moire effect will be different. Try one:

Put a picture in 1 Ai:

2. First remove the color. Select a picture, open Edit-Edit Color-Convert to Grayscale, and convert the picture to black and white:

3. Open "Effect-Pixelization-Color Halftone":

4. In the pop-up color halftone dialog box, set the moire angle:

5. Click "OK" after setting, and the effect is as follows:

Note: Different moire angles have different effects.