"Where do most particulate emissions attributed to cars come from? California speaks as if their primary source is the tailpipe. That was true in the past. But today most vehicle-related particulate matter comes from tire wear. Cars are heavy, and as their tires rub against the road, they degrade and release tiny, often toxic particles. According to measurements by an emission-analytics firm, in gasoline cars equipped with a particle filter, airborne tire-wear emissions are more than 400 times as great as direct exhaust particulate emissions."

"In the startup’s carbon dioxide removal system, sunlight will activate the chemical, and the acidic protons will flow into a tank of seawater. That will cause carbon dioxide gas to bubble out of the water, something like it does in a highly carbonated soda. The system captures the carbon dioxide for disposal and transfers the protons back to the photoacid. The seawater is returned to the ocean."

"Funded by the 2021 Bipartisan Infrastructure Law, the prize seeks to develop ​“a cost-effective and sustainable recycling industry” for wind turbine components that aren’t being recycled commercially today, including wind turbine blades and the supersized magnets inside some generators. Each winning group receives a $75,000 cash prize to help advance its recycling idea. If a team’s initial results are promising, it may go on to win an additional half a million dollars in cash, as well as a $100,000 voucher for technical assistance from a DOE national laboratory."

"As solar gains momentum, its champions are getting more creative about where to place panels. There are solar arrays on top of big-box stores, solar arrays on yachts and solar farms that float. There are panels small enough to work on a balcony and even small enough to attach to a smartphone. To minimize clearing land, engineers are also working on incorporating the technology into existing infrastructure. From landfills to art installations, here are five unexpected places you can find a solar farm — or at least some strategically placed panels."

"In those simulations, the researchers found that reducing the warming effect of contrails by 73% increased fuel costs by just 0.11% and overall costs by 0.08%, when averaged across those tens of thousands of flights. (Only about 14% of the flights needed to be adjusted to avoid forming warming contrails in the simulations.)"

"Smaller farms have historically irrigated using labor-intensive, manually operated systems. The systems could malfunction, flood crops, and operated inefficiently, requiring farmers to regularly go into the fields to check sprinklers and turn them on and off."