Sustainable Practices & Conservation Flashcards

Which life cycle assessment (LCA) phase evaluates the environmental impact of raw material extraction for air pollution control equipment?

Answer: Cradle-to-gate

Cradle-to-gate assessment covers environmental impacts from raw material extraction through manufacturing, before the product leaves the factory.

A facility installs variable frequency drives (VFDs) on exhaust fans. The primary air quality sustainability benefit is:

Answer: Reduced energy consumption lowering indirect emissions

VFDs reduce motor speed to match demand, cutting energy use and thereby reducing indirect emissions from power generation.

Under EPA's Significant New Alternatives Policy (SNAP), refrigerant substitutes are evaluated primarily to:

Answer: Replace ozone-depleting substances with lower environmental impact options

SNAP identifies and evaluates alternatives to ozone-depleting substances, promoting substitutes that reduce stratospheric ozone depletion and climate impacts.

A green building achieves LEED certification partly through indoor air quality credits. Which practice specifically contributes to IAQ credits?

Answer: Using low-VOC paints and adhesives during construction

Using low-VOC materials reduces off-gassing of volatile organic compounds, directly improving indoor air quality and earning LEED IAQ credits.

The Clean Air Act's Title IV Acid Rain Program uses cap-and-trade for SO₂ primarily to:

Answer: Reduce total SO₂ emissions cost-effectively while allowing flexible compliance

Title IV's cap-and-trade system sets an aggregate SO₂ emissions cap, allowing sources to buy and sell allowances for cost-effective, flexible compliance.

Biogenic VOC emissions differ from anthropogenic VOC emissions in that biogenic sources:

Answer: Are released naturally from vegetation and cannot be directly controlled

Biogenic VOCs are naturally emitted by trees and plants and are not subject to direct regulatory control, though they contribute to ozone formation.

Which conservation practice in industrial painting operations most directly reduces HAP emissions?

Answer: Switching from solvent-based to waterborne coatings

Waterborne coatings contain significantly lower concentrations of hazardous air pollutant solvents compared to solvent-based coatings, directly reducing HAP emissions.