Solar space heating units tend to be less expensive than solar water heating units because
A) solar heating units can be passive and water heating units must be active.
B) it takes longer to heat air than water.
C) air has a lower density and is usually less expensive to move than water.
D) solar space heating units can be used only near the equator.
C
You might also like to view...
Cities rely on their ________ for food and provide them goods and services
A) populations B) neighboring cities C) hinterlands D) farmers
Biogas is mostly produced in landfills
A) by the anaerobic decomposition of organic materials. B) by the release of compressed gases from aerosol containers. C) by the evaporation of the liquids draining from the buried waste. D) when solid materials melt into fluids and evaporate.
Rachel Carson's book Silent Spring, published in the 1960s, ________
A) focused on chemical pollutants, including industrial chemicals B) was concerned with birth defects in humans C) awakened the American public to negative effects of artificial hormones D) warned of insect pollinator losses through pesticide use E) was the beginning of the first wave of U.S. environmental policy
Governments can promote solutions to climate disruption by ____.
A. strictly regulating water vapor and sulfur dioxide as air pollutants B. phasing in carbon subsidies C. placing a cap on total human-generated carbon dioxide and methane emissions D. increasing taxes on businesses that encourage energy efficient technologies E. weakening energy efficiency standards