krzysztof joins news studio, he is the emergency response manager at amnesty international. he looks at the intersection of technology and human rights. forensics lab, it aims to verify information shared online. and a social media strategist, she is also heavily involved in online activism, and has been behind several viral campaigns sometimes we associate the viz didn't the excitement of an online campaign with it's effectiveness, how do you know it works. >> that's a great question, and you brought it to the point that people have very very high expectations. but expectations are not equal impact. on another level, i think people equal metric like a lot of members eethink social media is not very new in that regard. i think it sometimes have expectations that we can fix overnight, be uh that's unfortunately not the case. >> do you think that the social media campaign can get so big, that it actually overshadows the issue itself. >> call me an optimist, but i have a lot of hope when it comes to sort of the power of social media. for galvanizing companying bring back our gi

. >> thank you, krzysztof, elizabeth plank, and all of our guests until next time, we will see you online. >> part of al jazeera america's >> special month long evironmental focus fragile planet >> the drought takes hold with devastating results but now science fights back. >> it will map the water in earth's soil has the potential to be revolutionary. >> satellites tracking water from above. innovation shows water. >> ok, i'll take your word for it. >> a biologist specializing in evolution. techno investigates the new dust bowl. tonight, beyond science, innovative goggles and the story she'll never forget. >> looks like there's another one. hold on. >> that's our team. now let's do some science. >> welcome to techno. we have recently done this drive from l.a. to san francisco. it's beautiful, but in the central valley, you see the farms and signs. >> they basically say no water no jobs. >> california is in a really intense prolonged drought. this is a worldwide thing, all over the globe, there are more extreme weather events. places are getting warmer places are getting drier. it's a pre

. >> thank you, krzysztof, elizabeth plank, and all of our guests until next time, we will see you online. >>> this week on "talk to al jazeera", musician, songwriter, producer akon, the senna galees american artist that sold for than 30 million records. >> first i'm a businessman. >> akon is an activist and philanthropist and spend a lot of time promoting peace in areas congo. he's spending a lot of money to i don't have the quality of life of 1 million africans by bringing them electricity. he doesn't think the continent needs to be saved by the west. >> we are stopping africa from governing itself. they are still foreigners in certain areas that control africa. the singer says america has a problem with race. when i say african-american in america dealing with the issues, my first question is why don't they just go home. >> there's controversy about his performance style and lyrics. >> the women call themed [ bleep ] more than we -- call each other [ bleep ] more than we do. >> i caught up with him in dubai, where we talk business and being an american until america. few artists are ab

. >> thank you, krzysztof, elizabeth plank, and all of our guests until next time, we will see you online. >> the united states is in the midst of the worst drug addiction epidemic in its history. but it's not a crisis of illegal drugs. it's one of prescription painkillers - oxycodone, hydrocodone, and other legal narcotics, all related to opium. collectively they are called opioids. >> these are the opioid painkillers. and prescriptions for drugs like these have more than quadrupled over the last 15 years - to the extent that the us now consumes more than 80 percent of the global supply of these drugs. >> overdoses from prescription opioid drugs now kill nearly seventeen thousand americans every year. that's one overdose death every thirty minutes. >> the overdose rate which might have been 1 or 2 a month in our emergency department is now more like 3 or 4 or 5 if not more than that, in a 24-hour period. >> that's a massive increase. >> massive. >> over the past 10 years, we've had more than 125,000 americans lose their lives to painkiller overdose deaths. >> the food and drug administra