That means even a 100 percent renewable town might, from time to time, be sourcing its electricity from fossil fuels.

One way to characterize the spread of a disease like Covid-19 is known as a susceptible-infected-recovered model.

These mayors are members of C40, a network of 94 large cities—Paris, Los Angeles, Shanghai, Lagos, to name a few—committed to meeting the goals of the Paris Agreement of limiting global warming to 1.5 degrees Celsius over preindustrial levels and reducing global greenhouse gas emissions by 50 percent by 2030.That declaration didn’t just reaffirm these cities’ efforts to fight climate change .

Part of the old Studebaker site is now home to a data-storage and analytics firm; Buttigieg invested city dollars in transforming its largest factory—the prosaically named edifice known as Building 84—into 800,000 square feet of offices where tech and biotech companies are now headquartered.

“It got me thinking about the day-to-day issues that women face in major cities.”The survey suggests that those experiences on public transit led to many women to make a different set of transportation choices from those made by men.

“We have a weather event, in this case a downslope windstorm, where, as opposed to the normal westerly winds, we get easterly winds that are cascading off the crest of the Sierra Nevada,” says Neil Lareau, an atmospheric scientist at the University of Nevada, Reno.A windstorm barreling from the east just set the stage for this week's burning disaster.

The next year might be lower, but that doesn’t mean the trend will continue in the years that follow.What C40 found was that 27 of their member cities have hit that mark, meaning all sorts of initiatives—be they investment in public transport or renewable energy or green building practices—have been working.But the economies!