Signs of air pollution include spotting or twisting of the plant’s leaves, flower and bud fall off, and unusual discolorations as well as poor growth can signal a problem. Remember, plants are affected by the following elements: air, temperature, light, water and pollution. If you take all of these things into consideration when planning your hydroponic garden your plants are sure to thrive under your care. Commercial crop growers are turning to soil less cultivation more and more. The speed of growth combined with the control over the growing environment means higher quality crops. The worry over soil born diseases and pests are greatly reduced, plus weeding is a thing of the past. For commercial growers, rapid harvest and higher yields are great reasons to grow hydroponically. Hydroponic gardening helps to eliminate the need for weeding and helps to cut down on diseases and pests. This form of gardening is also easily adapted to indoor environments, which means it can be used throughout the year to grow a gardener’s favorite plants. The greatest advantage to hydroponics is the overall outcome of the plants, which will be of better quality and are much healthier. For impoverished people who live in a terrain or climate inhospitable to agriculture, hydroponics offers a means of growing food. In areas where food is traditionally produced, but where fields are over crowded or stripped of their nutrients, hydroponics is a way food can be produced using a minimum of space and resources. Once the batch has stopped bubbling the fermentation process has ceased and another batch will need to be made in order to continue the production of carbon dioxide. The use of decomposing organic matter is rarely used indoors because of the odor and it is unsanitary because of the bugs it attracts. It can be used outdoors in a greenhouse but the bug problem and their potential diseases need to be addressed in order to save your plants from their adverse effects. Many biological insects will not survive if the temperature is too hot, or if there isn’t a good source of water. Other ways to protect your hydroponic produce against spider mites include using non-toxic yellow sticky cards. The cards are useful for monitoring spider mites and many other small bugs.