We need all the help that we can get. This is a proven theory. There are things that we cannot do on our own. In the cases of taking care of plants, we as their caretakers cannot readily give them everything. Sometimes, we need to allow them to do their thing for them to live. The process I am talking about here is photosynthesis. This is a crucial step in their survival. Most plants rely on this method to have their food. One of the basic requirements to be able to do this is sunlight. Plants inside our home may turn their leaves into a more yellowish color after prolonged non exposure to sunlight. This signifies that the process is not done. With the continuation of this, the plant would die. You should take your plants out once in a while to give them the sunlight they need. If you do not wish to do this, you could just buy LED Grow Lights. This will provide for their need of sunlight and you will see that the leaves of your plant would once again turn into the healthy green color it once was.