As James Ravilious said

“England is a very green country, and “greenness” creates a monotonal view, and one that it’s difficult to achieve much contrast or colour gradation in. Transposing to black and white allows you a richer tone palatte, and to draw attention to the subject more subtly. Black and white contains a bright silver to deep black tone range in landscape images and thus turns a green flat image into a wonderful tonal picture” [https://nigelborrington.com]