McPherson, E.G. & J.R.Simpson, 2002, Potential energy savings in buildings by an urban tree planting programme in California, in: Urban Forestry & Urban Greening, ,
- Author : McPherson, E.G. & J.R.Simpson
- Year : 2002
- Journal/Series : Urban Forestry & Urban Greening
- Pages : 73-86
- Abstract in English : California is home to over 30 million people and world’s sixth largest economy. Its population is expected to nearly double to 60 million in the next 40 years, with concomitant increased demand for energy resources. The objectives of this study were to determine the effects of: existing trees on state wide and regional energy consumption for space heating and cooling and peak electricity demand; future tree planting on state-wide and regional energy for space heating and cooling and peak electricity demand; regional differences on annual energy savings, peak load reductions, and cost-effectiveness. Tree canopy cover data from aerial photographs and building energy simulations were applied to estimate energy savings from existing trees and new plantings in California. California’s urban forests are often for granted, but they are quietly working full-time to make cities more liveable. Approximately 177.3 million trees in energy conserving locations shelter buildings and moderate urban climates. As a result, utilities save $ 485.8 million annually in wholesale electricity purchases and generation costs, while ratepayers save about twice this much in retail expenditures for air conditioning. Planting trees now for future peak load reduction, annual cooling savings, improved air quality, and climate change mitigation is a sensible way to soften the impact that California’s growing population will have on limited energy resources and quality of life.
- Comments/Notes : KEYWORDS: urban forestry, energy saving, trees, climate change.