Articles
ENHANCING ENVIRONMENTAL QUALITY IN AGRICULTURAL SYSTEMS
Article number
609_41
Pages
277 – 283
Language
English
Abstract
Greenhouses have been extremely successful in providing abundant, cheap and high-quality produce, by using resources (water, minerals, pesticides) with a very high economic efficiency.
Marginal agricultural land is being rapidly converted into protected cultivation in many (semi-arid) regions of the world, hoping to pros-per both from primary and secondary activities.
Water use efficiency of greenhouse production is about five times as high as field production of vegetables.
However, in spite of using resources more efficiently, greenhouse areas have an enormous visual and environmental impact: diversion of limited good water resources; contamina-tion due to pollutants released with over-abundant irrigation; production of plastic and mineral waste and biological by-products; contamination due to plant protec-tion chemicals and emission of greenhouse gases (CO2) by heating with fossil fuels in Northern countries.
In addition, greenhouse production has an image problem: there is a general perception among European consumers that such an industrial production of food is non-natural and unhealthy, although in the Americas, for instance, the cleanliness of the production process is considered an advantage.
Since, the polluter pays very seldom, environment-friendly production is more expensive.
Therefore a large market in eco-labels has developed in response to consumers misgivings and in the hope of recovering (part of) the costs through higher prices.
However, there is little clarity about agricultural practices associated to each label and there are doubts about enforcement.
This paper analyses advan-tages and draw-backs of greenhouse production, and attempts to review the items where improvement is necessary in order to ensure that greenhouse production is sustainable, yet profitable also in the future.
Marginal agricultural land is being rapidly converted into protected cultivation in many (semi-arid) regions of the world, hoping to pros-per both from primary and secondary activities.
Water use efficiency of greenhouse production is about five times as high as field production of vegetables.
However, in spite of using resources more efficiently, greenhouse areas have an enormous visual and environmental impact: diversion of limited good water resources; contamina-tion due to pollutants released with over-abundant irrigation; production of plastic and mineral waste and biological by-products; contamination due to plant protec-tion chemicals and emission of greenhouse gases (CO2) by heating with fossil fuels in Northern countries.
In addition, greenhouse production has an image problem: there is a general perception among European consumers that such an industrial production of food is non-natural and unhealthy, although in the Americas, for instance, the cleanliness of the production process is considered an advantage.
Since, the polluter pays very seldom, environment-friendly production is more expensive.
Therefore a large market in eco-labels has developed in response to consumers misgivings and in the hope of recovering (part of) the costs through higher prices.
However, there is little clarity about agricultural practices associated to each label and there are doubts about enforcement.
This paper analyses advan-tages and draw-backs of greenhouse production, and attempts to review the items where improvement is necessary in order to ensure that greenhouse production is sustainable, yet profitable also in the future.
Authors
C. Stanghellini, F.L.K. Kempkes, P. Knies
Keywords
water use efficiency, land use, environment, eco-labels, recycling
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