It's about the dirty water problem. First of all, I want to talk about the facts of water needed to human and environment. Human body need 75% of water. The world's human population continues to grow, causing water needs to double every 20 years. More than 20 thousand liters of water are needed to ever human. But, every years millions of people get sick through water lack of clean water can cause the disease to spread more easily. The earth's is 70% covered by water mostly it's a salt water (sea). The rest of the fresh water on earth all comes from the soil, river and lakes. I want to share my idea about the DIY water filter. Its will help the human who don't have enough money to buy the product water filter.  I use natural and current materials to carry out the water filtration process. The materials I use are mineral bottles, cotton, gravel/pebbles, sand, charcoal and dirty water. As seen in my video, my first step is to put the cotton into the already cut bottle. Next, add sand into the bottle, followed by charcoal and gravel/pebbles. Finally, pour the dirty water into the DIY water filter and wait for the result. However, Water from DIY it’s not safe for consumption, it’s advisable to boil the Water. I think it's will help the problem of human healthy causes by dirty water.