What you might have missed this weekend.

Obama Announces California Coastal National Monument Expansion, SCPR

Among other national monument expansions, President Barack Obama announced Thursday the addition of 6,230 acres to the California Coastal National Monument, according to a release from the White House. That includes six additional coastal sites. The sites were proposed for protection in legislation introduced by members of the California congressional delegation in 2015, according to the statement. They add on to the monument that was originally designated in 2000 by President Bill Clinton. The monument was previously expanded by Obama in 2014, adding Mendocino County's Point-Arena-Stornetta. Read more.

Landmark Study: Marijuana Effective Medicine, but Has Drawbacks, SF Chronicle

Marijuana can be an effective medicine in some cases for treating pain, nausea, muscle spasms and other conditions, but the drug that is wafting into the mainstream is not harmless, and more research is needed, the nation's top scientists concluded in a landmark report released Thursday.

The nonprofit National Academies of Sciences, Engineering and Medicine issued its report, "The Health Effects of Cannabis and Cannabinoids," summarizing the body of research into the efficacy of medical pot. The 395-page paper stands as the most official medical review of the botanical drug, which an estimated 8 percent of American adults used in the past month. Read more.

Oakland Mayor Libby Schaaf Issues Executive Order To Prevent Warehouse Evictions, BisNow

Oakland Mayor Libby Schaaf (above at a Bisnow event) issued an executive order this week calling for property owners to create compliance plans within 60 days after receiving citations for permit or zoning violations. The order is an effort to avoid evictions and to help keep artists in Oakland, reports the San Francisco Chronicle. Mayor Schaaf also issued her support of a proposed ordinance from Councilwoman Rebecca Kaplan that would increase relocation fees paid to tenants kicked out of nonpermitted housing or poorly maintained living spaces. The fees would increase to $6,500 for a studio or one-bedroom from $3,446; to $8k for a two-bedroom from $4,346; and $9,875 for a three-bedroom from $6,034. Read more.

Bottoms Down! Silicon Valley Sobers Up, Ozy

When Peter Shallard goes to parties and networking events, he sometimes finds green juices, not martinis. Instead of shots, he hears excuses about waking up early to crush work. It's just the "radical nature" of Silicon Valley — its all-on, all-off mindset — only this time it's applied to alcohol, says the business consultant. Entrepreneurs are more "self-aware and more optimization-focused than ever before."

In the Valley, the new burgeoning normality is to teetotal — at least for as long as humanly possible. From the Twitter blasts of Dave Asprey, founder and CEO of Bulletproof Coffee, urging his 350,000 followers to drink kava instead of alcohol, to life optimizer Tim Ferriss' no-alcohol, no-masturbation 30-day challenge of a few years ago, the movement to put down the bottle has grown stronger. CEOs seeking an edge are abstaining, and employees are following their bosses' lead, or that of life optimizers. Of course, in the metrics-obsessed Valley, it's important to slap a number on heightened productivity without alcohol. Asprey points to a 15 percent boost, while Ferris claimed in a 2014 blog post that abstaining for 30 days meant he got "roughly 50 to 100 percent" more done while master of his domain. Even the Valley's wingdings are changing, according to San Francisco tech party-planner Christina Millikin. That's right: It's mocktails on the menu or bust. "It's kind of cool not to drink now," Millikin says. Read more.