2023年9月14日，河北省秦皇岛市海港区桥东里小学，教师带领学生绘制保护臭氧层主题长卷。曹建雄/视觉中国中年人最害怕的秃顶，大气层在经历。不过，变稀疏的不是头发，而是臭氧。化学式为O3的臭氧，公众熟悉又陌生。民航客机的巡航高度通常距地10千米，自然 ...

Freon 12 is the Dupont trade name for flurocarbon refrigerant gas, CCl 2 F 2. The material has a molecular weight of 120.92. Its critical constants are: T c = 385 K, p c = 41.2 bars, and Z c = (p c v ...

Ultimately, this could lead to cheaper and better-performing EVs. Chemical company opens new 'state-of-the-art' lab to ...

A hi-rise building in Northwest D.C. was evacuated on Tuesday evening after a gas leak scare, according to the D.C. Fire and ...

NO MORE DEBATE TRAUMA: Democrats can breathe a sigh of relief: Their candidate, by all pundit accounts, won last night’s ...

Home inspections, whether a full two- to three-hour evaluation of a house or an hour-long pre-offer inspection, are highly ...

CHESTERFIELD COUNTY, Va. (WRIC) — A Costco in the Midlothian area of Chesterfield County was evacuated Thursday after around ...

Nothing beats the sense of peace and relaxation that a vacation brings, especially when you can pack up the RV and hook up the travel trailer and go. Some of the luxuries like air conditioning are ...

A crew operating from a barge drilled a 2 1/2-inch hole into the tunnel's cast iron liner, causing water to pour through the ...

Stoneham firefighters called in a state hazmat team to identify a gas creating a haze coming from an HVAC system at LA ...

At approximately 1:18 P.M., the Stoneham Fire Department responded to a call at LA Fitness, 121 Main St., that a haze was ...