at the university of banning him who's just published a report on the use of what's up in nigeria cheeseman thank you for joining us and now you call it nigeria's fast what's up election why only seen a lot of elections in nigeria and they've often used in recent times social media but the use of whatsapp it's really been gaining pace and people in many countries in africa now use what's out way more than they would use e-mail weight more than they would use text messages or facebook missions so whatsapp is really becoming one of the dominant ways of communicating quickly and easily and at the mediate we think is one of the most important ways of communicating in nigeria so that's what makes this nigeria's first whatsapp alexion. i to same time it's being used to spread fake news why is it such a powerful tool in the spread in fake news well there's two critical things one obviously works out is encrypted which means that the government or anyone else for that matter can actually tell what you're sending on whatsapp so people feel particularly protected now that's a good thing it can be use

stuart: kelly cheeseman, the man with the app that always works.ly, thanks very much for joining us. we appreciate it. happy presidents day to you, lad. thank you. >>> how much does it cost to change a light bulb in new york city? sounds like the start of a really bad joke, doesn't it? it is not the start of a bad joke. it's a warning as to what might happen if the democrats have their way on the green new deal. my take on that is next. this is decision tech. it's screening technology that helps you find a stock based on what's trending or an investing goal. it's real-time insights and information, in your own customized view of the market. it's smarter trading technology, for smarter trading decisions. and it's only from fidelity. open an account with no minimums today. . . stuart: in new york city, the light bulbs in 23 howing projects are being changed, switching from the old incandescent bulbs to leds. you wonder why we are spending time discussing light bulbs. here is why? it costs 1973 for each apartment, to change the light bulbs. i will rep