close-up old tree bark. natural patterns and rough texture. organic material ideal for eco-friendly projects emphasizing

bark texture tree background old wood carbon neutral natural pattern rough surface grain organic eco nature design sustainable closeup material forest abstract environment rustic rind brown aged weathered trunk timber growth ecology detail biodiversity conservation climate green earthy rugged wall wallpaper environmental backdrop lumber friendly gray grunge log plant hard close-up bark patterns texture ideal eco-friendly projects emphasizing sustainability neutrality eco-conscious project