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and, a death in e azon warehouse.n accident and an investigation at one of the world's largest companies. plus, "waste not." finding sources of renewable energy in surprising places. >> 100 pounds of cow manure per cow per day. we're treating it through this system and getting electricity. >> woodruff: all that anmore, on tonight's pbs newshour.

and if you look, wal-mart versuz e-commerce, that's triple the growth rate of azon.t's what's really driving the overall same store sales growth. and is really driven by the grocery pickup and less so grocery delivery. >> while analyst are largely positive about wal-mart's grocery programs, there is some concern about where gwthill come from next. >> a lot of e growth right now is t coming from rollout of online grocery pup. to a third of gross in the u.s. business. as they fully penetrate that, the rollout o that it may be a littlearder to sustain the 3% plus comgrowth. >> grocery is more th half of wal-mart's totals sales. it's been the most important category for someime. while new online grocery options are driving business to wal-mart, grocery has low s, margaking it less profitable business than a category like kroegting. and the retailer online business is stillxpected to lose more money -- in the meantime the bigger near term test is the holiday season. with black friy just over two weeks ago. for nightly "nightly business report," i'm couney reagan. >> let's

. ♪ frontline's, "kids caug in the crackdown" and "iraq's secret sex trade" are available on azon primes. and i was so lonely. i'd sit in that room when everybody woulgo to bed, and i would cry. uh. just cry. and i remember looking at the blanket, and i remember seeing the stars. like, there was that thing covering the window. but, right above it i could just see the stars, and i don't even know what it was. but i could see it all. i could see my future. i could feel it. i feel like there was something out there, gi and i just wouldn' up. t with a lot as a kid.

and, a death in e azon warehouse. an accident and an investigation at one of the world's largest companies. plus, "waste not." finding sources of renewable energy in surprising places. >> 100 pounds of cow manure per cow per day. we're treating it through this system and getting electricity. >> woodruff: all that anmore, on tonight's pbs newshour. >> major funding for the pbs newshour has been provided by: ♪ ♪ moving our economy for 160 years. bnsf, the engineushat connects . ss when it comes to wirele itconsumer cellular gives customers the choice. our no-contract plans give you as much, or te little, talk, and data as you want, and our u.s.-based customer service team is onand to help. to learn more, go to consumercellular.tv >> the ford foundation. working with visionaries on the frontlines of social change worldwide. >> and with the ongoing support of these institutions: and friends of the newshour. s >> togram was made possible by the corporation for public broadcasting. and by contributions to your pbs station f

. >> i'm calling from azon building i'm one of the associates here gas leak here.that there is a there was twassociates that i know for sure that were miting. one girl almost completely pass out. >> reporter: she says management wouldn't stop operations for fear of not meeting their quotas. >> i already said something to them several times, like, everyone's sick d you're not letting people go, like they're trying to tell us, ¡you have to use our personal time if we want to leave.' they're worried about getting fired or losing their hours or losing their pay. and at's not something that they should be worried about when there's a gas leak. you should be worried about your life. >> reporter: workers who left their shift at day were docked for personal time, though amazon eventually reversed that after workers complained. >> when they sit there and say that, all they care about is the safety of their employees. well, obviously not, because if theyared about the safety-- if safety was first, then everybody would have been evacuated from that building and they weren't. >> reporter: in its s