Plants recycle the air we breath and can provide a natural filter for the air. It is the hot summer or a blast of heat. Red plants or plants with red flowers make excellent Fire remedies. In this case large granite boulders, or a beautiful clay statue can be used. Terracotta pots filled with potting soil make a great Earth remedy.
Earth also represents the Mountain.
The most common solution, Metal can be found in all forms. Copper, Silver, Gold, and Bronze are a few variations of the Metal Element. Using the Metal Element can encourage all sorts of creative ideas. The key thing to remember is that Feng Shui is about creating a beautiful environment. When utilizing the Metal Element, ensure that it is rounded and pleasing, not sharp and pointed.