So, this Kai-Ka here is blue yet in general the color depends on manufacturers and the atmospheric composition is one of them. So if we know the color, we can detect the air results in the air. Let's make sure we're how we start. Step 1. We make a theoretical prediction based on the ideal composition of the atmosphere. We take into account the ozone layer, the release scattering of light, the differences of the density of air and different altitude, and the sensitivity of a human eye. Step 2. We take a picture of the sky and compute the actual sky color. Step 3. We undo the effects of various camera settings and step 4. We compare these two colors to get a single difference value caused by the presence of the air results in the atmosphere. But what does this value actually mean? The short answer is we don't know and we need your help. By pressing the single button you can upload your values to our website. Every single number will be at that point in our statistical correlation graph and once we have enough of that. Anyone anywhere in the world will be able to measure the composition of the atmosphere just by moving the phones over here and tapping the camera button.