So in this particular study what we did was we looked at about 230 lakes around the world and it was a combination of using ground measurements from boats and people going out there and measuring the temperature of lakes together with satellite measurements where we take the temperature of the lakes from space. And so what we wanted to do was see how lakes were changing over the entire globe and look at what variations there were in the warming rates across the globe but also how much variation there was between lakes that were close together. So one of the things that we noticed which was quite interesting was that these lakes are actually in some cases warming faster than the air temperatures. Because the air temperatures you know change in an instant whereas the water temperatures they reflect what is going on in the entire environment around them so it could be a reflection of their being less cloud cover. It could be you know a consequence of more glacial melt water coming into the lake. All these different processes taking place and they integrate them and they warm more gradually but the consequences of that warming can be very serious. So. So for example if we looked at these warming rates projected what would happen in the next century then what we would see is that algal blooms would go up by about 20% this is the green algae that you see in the lakes oftentimes in the summer. And some of that green algae that is added some of it contains harmful toxins and so what it can do is it means puts restrictions on people going out on the water or using the water for drinking purposes and things like that. So there are real consequences to the actual lake ecosystem. So. So what we can do is even though it may take a long time before we do something about the temperature what we can do is we can make sure that we do have as little pollution as possible going into the lakes so that that pollution that gets in there doesn't get an extra boost from the fact that the lakes are warming up. So we can actually do things about it and in fact if you look at say the lakes around here if you look at for example Lake Tahoe a lot has already been done about that I mean what they're doing there is they are.