Question

all of the statements are true except:
photovoltaic cells are used to convert the sunlight energy directly into electricity.
the potential energy of the wind is converted into kinetic energy by wind turbines.
sustainable design helps to save money, reduce the use of fossil fuels, and the emission of pollutants.
the generation of wind is unpredictable.

Explanation:

Photovoltaic cells convert sunlight to electricity. Sustainable design has the mentioned benefits. Wind - generation is somewhat unpredictable. However, wind turbines convert the kinetic energy of the wind, not the potential energy.

Answer:

The potential energy of the wind is converted into kinetic energy by wind turbines.