Forskning

Varför ska vi omge oss med växter på våra arbetsplatser?
Forskning och undersökningar visar att om vi vistas i miljöer med växter så får det en rad positiva effekter för både individen och arbetsresultatet.
En del i detta är ganska självklar; en fin och hälsosam miljö får oss att må bra och därmed prestera bättre.
De studier som vi refererar till nedan visar skillnaden på jämförbara grupper människor som vistas i miljöer med och utan växter.

Resultatet?

Inte nog med att växter tar upp och bryter ner formaldehyd, trikloretylen och bensen. De människor som omges av växter har lägre sjukfrånvaro, är mer kreativa, presterar bättre!
Forskare över hela världen har bevisat hur mycket växter förbättrar vår arbetsmiljö inomhus. Läs mer om vilka förbättringar ni kan få!

Studier

Här är några av de områden som studeras och vilka positiva effekter växter har på oss:

• Förbättra produktiviteten
-Med så mycket som 12%(Lohr)

• Koncentration
- Speciellt om du sitter framför en dator i mer än 4 timmar om dagen (Berg, Lohr)

• Kreativitet
- Bidra till ökad kreativitet (Ulrich, Hesselink)

• Buller
- Absorbera och avleder ljud (Costa)

• Energi
- Värme och kyla regulatorer (Costa, Schempp)

Inte mindre viktigt än de exempel som nämns ovan, är det faktum att växterna minskar sjukdom och klagomål gällande dålig hälsa.

Här följer en sammanställning (Eng.) av studier inom ämnet
Existing research about plants cleaning the indoor air of toxins (VOCs)

Dr Bill Wolverton conducted early research for NASA (early 1990’s, book first published 1996) to prove that plants absorbed toxins from the air around them, translocated it to their roots, where organisms turned the toxins into food for the plant. Wolverton published a book after his research naming a number of plants which are accepted as the most effective.

Later research from Dr Ronald Woods, University of Technology, Sydney, Australia (2001 & 2004) did further research both in laboratory and real life settings to show that plants removed toxins from the indoor air. Wood used Kentia Palm, Dracaena and Spathiphyllum (Peace Lily) plants.

Meanwhile research in Norway found that air in schools was cleaner once plants were introduced. Plants used in this research project by Professor Tove Fjeld (pronounced Tovay Feld), University of Agriculture, Oslo (1998) were: Aglaonema commutatum, Epipremnum aureum (Scindapsus aureum) and Dracaena deremensis.

Professor Margaret Burchett, University of Technology, Sydney commented on interim research results (2009) finding that all plants work in the same way i.e. all plants remove toxins from the air.

Andrew Smith, School of Built Environment, John Moores University, Liverpool (2008) conducted research in offices in Edinburgh to show that plants removed the toxins. Plants used: Ficus Alii, Philodendron Scandens, Dracaena Compacta, Scindapsus Aureum, Dracaena Gold Coast, Calathea Triostar, Schefflera Louisiana, Schefflera Arboricola, Schefflera Gold Capella, Spathiphyllum, Calathea Ornata Sanderiana, Calathea Beauty Star, Dracaena Lemon Surprise, Ficus Elastica Melany petit, Ficus Natasja, Peperomia USA and Peperomia Red Margin.

Dr Ronald Wood, University of Technology, Sydney (2004) calculated how many plants per room under certain circumstances were necessary to clean the air.

Kwang et al, National Horticultural Institute, Korea (2008) looked at how two plants absorbed formaldehyde in laboratory conditions. The two plants he used were Ficus benjamina and Fatsia japonica.

Existing research about O2 and CO2 exchange between man and plants

Dr Bill Wolverton, NASA, USA (early 1990’s, book first published 1996) discovered the symbiotic exchange of carbon dioxide and oxygen between man and plants.

Dr Manfred Weidner, Botanical Institute, University of Cologne (1990s) considers the exchange and relates leaf surface area to the absorption of CO2

Andrew Smith, School of the Built Environment, John Moores University, Liverpool (2008) found that plants reduced CO2 by 50% in a planted open plan office

Prof Margaret Burchett, University of Technology, Sydney, Australia (2010) also acknowledges the biological/scientific exchange between man and plants
Bill & John Wolverton (1990s) show that some species of plants exchange oxygen/CO2 at night

Existing research about plants reducing absenteeism

Plants increase concentration, performance, motivation, productivity, mood etc

Prof Virginia Lohr, Washing State University, USA (1996) found that people working with plants in the room were as much as 12% more productive

Prof Tove Fjeld’s (University of Agriculture, Oslo, Norway 1997) installation of plants in the x-ray department of Oslo radiology hospital reduced tiredness/exhaustion and improved worker output; planted classrooms afforded an increase in student concentration of 23%

John Berg, DHV AIB, The Netherlands (1995) found that a plant on or by the desk of computer users improved concentration and therefore improved performance

Amanda Read, Royal College of Agriculture, Cirencester (2005) conducted research amongst students and found that concentration improved in lecture rooms with plants

Prof Margaret Burchett’s (University of Technology, Sydney, Australia 2010) research showed that plants improved mood and therefore performance

The effect of plants on our creativity
Prof Roger Ulrich, Texas A & M University, USA (2008) found that plants and flowers had a positive effect - +15% - on our creativity

John Hesselink, TNO, The Netherlands (2009) showed that plants had a positive effect on creative tasks except in production (repetitive tasks)

Shibata & Suzuki’s (Bunko & Doshiba Universities, Japan 2003) study found that plants improve creative performance

How plants affect our well-being in various settings
Hospitals
Prof Roger Ulrich, Texas A & M University, USA (1983 +) showed that plants could speed up recovery from major surgery and lessen medication necessity
Park & Mattson, Kansas State University (2008) found – similarly to Ulrich – that plants speeded recovery from surgery with the need for less medication

Prof Tove Fjeld’s (University of Agriculture, Oslo, Norway 1997) installation of plants in the x-ray department improved air quality and reduced minor sickness ailments as well as reducing absenteeism by 60%

Dr Jane Stiles, Oxford Brookes University (mid 1990’s) found that plants in the reception of a hospital reduced fear of their visit

Schools & colleges
Prof Tove Fjeld, University of Agriculture, Oslo, Norway (1996 + 1998) found that plants in schools cleaned the air, lessened minor ailments linked to SBS, reduced stress, didn’t irritate or cause asthma

Amanda Read, Royal College of Agriculture, Cirencester (2005) showed that students were more attentive and more likely to attend lectures in planted rooms

Shopping Centres
Jorn Viumdal, University of Agriculture, Oslo, Norway (mid 1990s) found that shoppers stayed an average of 20 – 25 minutes longer in planted centres

Kathleen Wolf’s (Washington State University 2002) study showed that the perception of plants outside of shops in the Mall gave them a perceived high class image

Prisons
Dr Eamonn O’Moore (1982) found that view of greenery reduced the sickness of prisoners

Green spaces
Nancy Wells, Cornell College of Human Ecology, University of Michigan (2002) showed that children brought up in greener surroundings had better cognitive ability and concentration

Older population
Dr Jeannette Haviland-Jones, Rutgers, State University of New Jersey (2002) – flowers (& plants) ease depression, inspire social networking and refresh memory as we age

The effect of plants on our indoor atmosphere
Prof Virginia Lohr, Washington State University (1995) – plants improve humidity levels causing a reduction in particulate matter (dust)

Prof Tove Fjeld, University of Agriculture, Oslo, Norway (1996 & 1998) – in school project, the measurements showed no difference in the dust particles or the fungal spores present in either room

German environmental biologist, Manfred R Radkte (1990s) – plants are natural humidifiers, reducing dust and also keeping us healthier

Prof. Dr. Konrad Botzenhart, Hygiene Institute of the University of Tübingen (1990s) – plants improve humidity which reduces airborne dust so causing us less respiratory problems

Andrew Smith, School of the Built Environment, John Moores University, Liverpool (2008) – plants improved humidity levels to a ‘comfortable’ level

Engelbert Kotter, Bavarian State Institute of Viticulture and Horticulture (2002) – plants raise humidity and comfort perception levels
Hensler, Stutgart (1992) – plants return 90+% of the water we give them, back into the air

Peter Costa, South Bank University, London (1995) – plants absorb noise

Peter Costa, South Bank University, London (1995) – grey water recycling with plants

Energy savings with plants
German architect Dieter Schempp, LOG ID (1990s) – plants make good air conditioners

Peter Costa, South Bank University, London (1995) - using plants to minimise costs of air conditioning and heating

Other benefits of plants
Dr Tina Marie Cade, Texas State University (2008) showed that plants affect perceptions about our quality of life especially at work

Craig Knight, University of Exeter (2009) showed evidence that enriched work environments can improve productivity by more than 15%. If the employees themselves had a say in the enrichment, then productivity improved by as much as 30%