Soldiers need to be able to communicate on a noisy, dangerous battlefield even when conventional means of communication are unavailable.
To help meet that need, the US Army has just updated its compilation of hand and flag signals.
One configuration of flags signifies “Chemical, biological, radiological, and nuclear hazard present”:

Or a soldier may need to signal “I do not understand,” as follows:

See Visual Signals for Armor Fighting Vehicles (Combined Arms), GTA 17-02-019, US Army, February 2018.
We won’t solve the cost-of-living crisis without improving the capacity of state public utility commissions to protect customers, find and implement new solutions to meet rising demand, and realign broken utility incentives.
Public service commissions should require utilities to quantify avoided healthcare costs, reduction in pollution exposure, and improvements in population health alongside traditional metrics.
California just took an important step toward making electric trucks more affordable and easier for businesses to buy.
In 2023 alone, more than 2,300 people died in the United States directly from extreme heat. Expanding access to residential air conditioning could reduce heat-attributable deaths and adult emergency department.