Vertical greening refers to a method of vertical greening using climbing plants to grow in the air, in order to achieve the maximum use of air and sunlight in a limited area to improve the efficiency of greening. According to the above definition, which of the following is the following related to vertical greening? ['Parthenocissus covered the wall and roof.', 'The pine forest extends from the foot of the mountain to the top of the mountain.', 'Utilizing the characteristics of Bagan grasshopper climbing, people gradually develop an oasis in the desert.', 'In hilly areas, people often use aircraft to seed from the air to green the mountains.']