Boeing is making what it calls a “best and final offer” to striking union machinists. The proposed contract put out on Monday includes bigger raises and larger bonuses than the offer that union members overwhelmingly rejected this month. About 33,000 Boeing workers began their strike over pay and pensions more than a week ago. Boeing says the new offer is contingent on workers ratifying it by late Friday night. Boeing says it would raise pay by 30% over four years, up from 25% in the contract that workers rejected just before going on strike on Sept. 13.

A tugboat powered by ammonia sailed for the first time Sunday in the Hudson River to show how the maritime industry can slash planet-warming carbon dioxide emissions. The tugboat used to run on diesel fuel. The New York-based startup company Amogy bought the 67-year-old ship to power it in a new, carbon-free way using ammonia and an electric fuel cell. The tugboat’s first sail is a milestone in a race to develop zero-emissions propulsion. Emissions from shipping have increased over the last decade — to about 3% of the global total according to the United Nations— as vessels have gotten much bigger, delivering more cargo per trip, using immense amounts of fuel oil.

California is suing ExxonMobil for allegedly deceiving the public for half a century by promising that recycling would address the global plastics pollution crisis. His office filed a lawsuit Monday. It’s separate from a complaint filed by nonprofit environmental organizations. ExxonMobil is one of the world’s largest producers of plastics. The lawsuits allege the company misled the public through statements and slick marketing campaigns. California Attorney General Rob Bonta said less than 5% of plastics are being recycled into another plastic product in the U.S. despite being labeled as recyclable.

San Francisco’s sidewalks were once notorious for sprawling tents belonging to homeless people but are now largely clear. There are still thousands of homeless people living in RVs and cars and in expanded shelter beds. But Mayor London Breed’s office says the nearly 3,000 people counted sleeping outdoors in tents is the lowest figure in a decade. And even fewer people are likely living on sidewalks after Breed ramped up enforcement of anti-camping laws following a U.S. Supreme Court decision this summer. Part of the decrease in tents is also due to San Francisco adding thousands of new shelter beds and affordable housing units.