Trees help you breathe more easily

Apr 26, 2012

Research by the University of Birmingham has contributed to The Woodland Trust's new Urban Air Quality report. Published in collaboration with Lancaster University, the report highlights how considered planting of trees and other vegetation can be used to significantly improve air quality in towns and cities. In fact, just through the screening of single trees, it has been shown that the concentration of certain types of pollution can be reduced by 15-20%.

Impacts of air pollution cost the UK economy an estimated £9-19 billion every year according to the Department of the Environment, Food and Rural Affairs (DEFRA). Figures from the Environmental Audit committee also suggest that air pollution reduces life expectancy in the UK by up to eight months.

Professor Rob MacKenzie from the University’s School of Geography, Earth and Environmental Science comments: “Green roofs, green walls, street and parks all affect our exposure to urban air pollution in dramatically different ways that we should be careful not to confuse. Taken together, we should think of these green elements of a city as providing an infrastructure that supports our urban lifestyles in ways that are every bit as important as the grey infrastructure of roads and pipes and wires.”

Mike Townsend, Woodland Trust Conservation Advisor adds "Although air quality in the UK has improved in recent decades, there remain serious health issues relating to , particularly in towns and cities. For example, the UK has one of the world’s highest rates of childhood asthma, with about 15% of children affected. But, as this new report shows, Columbia University researchers found asthma rates among children were significantly lower in areas with more street trees."

Pollution causes irritation of the lungs and can worsen existing lung conditions. It also affects people with heart conditions, especially when combined with high summer temperatures. Worst affected are poorer, mostly urban, areas close to busy roads and inadequately served by green space. The Woodland Trust hopes that the report will highlight the step change needed to increase tree planting in urban areas.

Dr Tom Pugh from Lancaster University adds, "Air quality is often listed as one of the potential benefits of increasing tree cover in urban areas, but few urban greening projects appear to take into account how air quality goals can best be achieved."

Careful selection and placement of tree species can help to ensure positive impacts are greatest and any negative impacts are minimised. However, the large-scale planting of almost all tree species will have a positive effect on .

Explore further: CO2 emissions set to reach new 40 billion ton record high in 2014

add to favorites email to friend print save as pdf

Related Stories

New study shows how trees clean the air in London

Oct 05, 2011

New research by scientists at the University of Southampton has shown how London's trees can improve air quality by filtering out pollution particulates, which are damaging to human health.

Urban rail reduces carbon monoxide air pollution

Jun 29, 2011

The opening of a major urban rail system in Taiwan caused a meaningful reduction in air pollution, according to a forthcoming study by two professors at the University of California, Merced.

Mexico City air pollution is studied

Mar 03, 2006

Scientists from the National Center for Atmospheric Research in Boulder, Colo., and other institutions are in Mexico City this month for a pollution study.

Recommended for you

World greenhouse emissions threaten warming goal

11 hours ago

Emissions of greenhouse gases are rising so fast that within one generation the world will have used up its margin of safety for limiting global warming to 2°C (3.6°F), an international team of scientists ...

Tens of thousands join London climate march

12 hours ago

Tens of thousands of people in London joined a global day of protest Sunday to demand action on climate change, among them British actress Emma Thompson who said the challenge to save the planet was like ...

UN summit to test commitment to climate fund

12 hours ago

A global fund created to spearhead climate change financing faces a key test at a UN summit this week when it looks to the leaders of the industrialised world to stump up billions of dollars to fill its underflowing ...

User comments : 0