The Ethereum network’s main source of income from layer-2 (L2) scaling chains — “blob fees” — has sunk to the lowest weekly levels so far this year, according to data from Etherscan.

Ozone exposure in the first years of life correlated with a higher likelihood of asthma and wheeze at age 4 to 6. Ozone represents the criteria air pollutant most commonly exceeded among U.S ...