Certified Professional Horticulturist (CPH) Practice Exam

Which two environmental factors have the greatest impact on energy conservation?

1. Wind and soil

2. Sun and wind

3. Temperature and soil

4. Humidity and temperature

The correct answer is: Sun and wind

The combination of sun and wind is particularly significant when discussing energy conservation because both factors directly influence the microclimate of a given area. The sun is the primary source of energy for the Earth, affecting temperature and light availability. In terms of energy conservation, effective management of sunlight can reduce the need for artificial heating and cooling. By positioning structures or planting trees strategically, one can maximize the benefit of sunlight for warming in the winter while providing shade in the summer, thus conserving energy. Wind, on the other hand, plays a crucial role in energy conservation as it can influence heat loss from buildings. Wind break strategies, such as using fences or plantings, can reduce wind speed around structures, thereby minimizing heat loss during colder months. Effective design that takes wind patterns into account can lead to significant energy savings by reducing the demand for heating during winter and enhancing cooling efficiency during summer. The combination of these two factors allows for a comprehensive approach to energy conservation, enabling both passive and active energy-saving techniques that are responsive to natural environmental conditions.