This isn’t new information really. As the link mentions, arsenic occurs naturally in the water of different regions and rice absorbs this. Since making white rice involves polishing off the most arsenic-ity part of the rice it isn’t a problem, but brown rice is.

Don’t feed infants and children things sweetened with brown rice syrup and, if you eat shit tons of brown rice, consider cooking it like pasta (boil it in extra water then strain out the excess water, instead of boiling it “dry”). You can also soak it before hand and discard the water. Arsenic is water soluble so any step like this will reduce the arsenic.

Arsenic is a carcinogen but so is low gut motility from not eating enough fiber so you really have to pick your poison.

““This exposure assessment is only one side of the equation when examining the potential trade-offs between brown and white rice consumption,” Wu said. “Even if arsenic levels are slightly higher in brown rice than white rice, more research is needed to demonstrate if the potential risks from this exposure are mitigated in part by the potential nutritional benefits provided by the rice bran.””