I am new to blender and I was wondering if there was a way to delete unwanted world environments.
If you have created a background you do not like just click the X at the top of the world buttons for ’ delete link to this data block’. If you want it to be solid black or solid white, you have to do that by adjusting the color sliders. For black slide them all the way to the left. for white, to the right. If you are wanting to export your scene with no background though, just leave it at the default blue. As soon as you touch one of the world buttons, you have a background. Until then, it is no background.