Photographers often struggle with creating emotion in their landscape images, without actually photographing rubbish heaps and urban sprawl and industrial pollution. I think there are at least two ways in which emotion plays a part in really good landscape images.
For a start, instead of asking what emotion an image generates, think instead of mood of the image - is it peaceful, dramatic, bold, quiet, subtle, shouting, sad, angry, agitated, scary, shy, loud, brash, rude, sublime? Does it make the viewer feel awe, wonder, puzzlement, curiosity, calm, smug, satisfied, complete, uncertain, doubtful, regretful, wistful?
Awe and wonder can be generated without dramatic light, huge canyons, storm clouds and long shadows. The awe can be created (in some viewers) through subtlety, by showing something not usually seen, through the detail shown and the careful arrangement of the elements of the photograph.