Here are five news items from the past week that you may have missed, starting with…

…the announcement of a new study that provides more evidence that lead poisoning is a major driver of crime , due to its effects on aggression and impulse control.

In energy news, the nation of Morocco just turned on its giant 160-megawatt solar power array . The array will eventually cover 6,000 acres and generate the same amount of energy as a small nuclear reactor.

In a sign of things to come, Norway’s government has a agreed on a plan to ban new sales of gasoline-powered cars by 2025 , only nine years from now. It looks more and more like the days of driving cars powered by explosions are numbered.

Washington University in St. Louis reports that teen use and abuse of marijuana has declined , even as more states legalize pot for recreational use. Behavioral problems related to marijuana use have also declined.