The acidity of acid rain is too weak to corrode metal or concrete or stone structures.

                es un recurso que tiene valor económico para una empresa.

Secondary treatment with an aeration basin is where aerobic bacteria digest the smaller solids particles as food in a sewage treatment plant.

Solar energy is the most abundant energy resource with more solar energy striking the earthâ s surface in 1.5 hours than the worldwide energy demand for a year.

                es un instrumento para prestar garantía del cumplimiento del pago del crédito hipotecario y sus intereses. 

Which is NOT TRUE of tectonic plates?

A reduction in the force of coughing which can contribute to inadequate airway clearance of secretions may be attributed to what age-related decline in the respiratory system

This species, which once numbered in the billions, was exterminated and the last one died in a zoo in 1914:

Which is NOT included in synthetic fertilizer?

Which of the following is NOT an indicator of junk science?