Which of the following facts are true about ground level ozone? a. O3 and primary pollutant
b. O3 and secondary pollutant
c. O2 and primary pollutant

Which governments provide garbage collection services to homes and businesses

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?