Such phenomena as a result of calculating the area of a room 100 square feet per tree 1 pot. For activated carbon 100 g, 200 g and 300 g were tested for reduce Volatile Organic Compound (VOCs). When tested to reduce the amount substances and photocopying room found that VOCs amount reduced VOCs substances fell 82%, 62% and 94 % respectively. Which shows that the activated carbon size 300 g can reduce VOCs best.