woman's hand holding a pile of wood pellets in front of a burning fireplace. winter and cold weather concept

39aph39 abundance biofuel biology biotechnology boiler burning chimney climate close cold comfortable concept concepts conservation copyspace economy efficiency energy environmental fireplace firewood flame front full glowing granule hand healthy heap holding home horizontal improvement industry issues lifestyle living material one pellet pellets person pile recycling renewable room s social stove technology temperature textured timber weather winter woman wood