• Ask Mark
    • Search the Library
    • Mark’s Blog
    • eNewsletter / Subscribe
    • Books
    • Links
  • Cullen’s Foods
  • Trees For Life
  • Events
    • Gardening Communities
  • About Mark
    • Mark and Ben’s Bio
    • Book Mark as a Speaker
    • Mark in the Media
    • Contact Us
March 3, 2018

Maximize Your Negative Emissions

Published in the Toronto Star – March 3, 2018

 

“Negative emissions” are a good thing.  For the environment and for your health.

Scientists don’t always think like marketers when they name these things.  We wish that negative emissions sounded more positive.  Cause they are.

Negative emissions – the removal of pollutants from the atmosphere – have always been a by-product of plant life.  They are becoming ever more important as we confront global climate change.  So important that there are technologies being developed to artificially mimic what plants have been doing all along.

But we’re plant people, and some plants produce negative emissions more efficiently than others. Let’s talk about maximizing our negative emissions, as gardeners.

The Heavy Lifting

Forests have been called the ‘lungs of the earth’, as trees take in carbon dioxide, and pump out oxygen. It is true that all plants absorb carbon dioxide, but trees really are the most effective due to their size and extensive root structures. However, not all trees are created equal. According to the U.S. Department of Energy (DOE), the most effective species at generating negative emissions are trees which grow quickly and live a long time. The challenge is that these two traits are generally mutually exclusive.

Right tree/right place.

The answer is to plant the right tree in the right place to ensure that it can live a long, healthy life. The biggest issues   to consider are soil quality, site selection, and species selection. Thankfully, researchers at the Vineland Research and Innovation Centre here in Ontario have launched Greening the Canadian Landscape Program (http://www.greeningcanadianlandscape.ca/).   Based on their research in Ontario and Alberta, the program digs into soil remediation and species selection to make recommendations that maximize the odds of choosing the right tree for your location.

In the Garden

As garden plants go, a native perennial garden is more sustainable by virtually every measure when compared to a planting of annuals. Not only do perennial plants come back every year, which eliminates the energy-intensive process of replacing them, but they have deeper roots. The roots allow them to sequester more carbon in the soil by passing it along to mycorrhizae in exchange for nutrients. The mycorrhizae store the carbon in the soil as glomalin, which forms humus. No, not the kind you dip crackers in, but a soil component that is mostly carbon.

Around the Garden

The larger shrubs and evergreens you place around your yard also play a role in negative emissions, especially for filtering particulate matter that contributes to human health concerns such as asthma.

Royal Horticulture Society (RHS) research in the UK found that shrubs such as yew and cotoneaster, two plant species that are winter hardy and widely available in Southern Ontario, are remarkably well suited for filtering particulate pollutants from nearby traffic. To maximize the benefit, they should be planted as a hedge separating people from the source of pollution. Regular pruning produces a denser hedge with a greater filtering capacity.

The added benefit of a hedgerow rather than a fence is that it will cool warm air in the summer, provide a habitat for birds and bugs to improve the overall biodiversity in your garden.

In the Home This is a wonderful time of year to add to your indoor plant collection.  The NASA Clean Air Study was a joint project between the National Aeronautics and Space Administration (NASA) and the Associated Landscape Contractors of America (ALCA) in 1989, and it remains the authoritative list for common indoor plants with maximum negative emissions. These plants were identified not only for their ability to absorb carbon dioxide, but also toxins such as benzene, formaldehyde, and ammonia among others. Here are three:

  • Spider Plant (Chlorophytum Comosum “Vittatum”) Hands-down one of the easiest plants to grow and is just as easy to propagate by the little ‘baby spider-plants’ it produces. Give it bright, indirect sunlight. Removes formaldehyde and xylene.
  • Dracaena (Draecena ) Available in over 40 different varieties, which means you should have no problem finding one you like. Be mindful of pets, however, as dracaena can be harmful if consumed. Removes benzene, formaldehyde, trichloroethylene, and xylene.
  • Peace Lily (Spathiphyllum) They not only tolerate low light, they also produce a unique flower while purifying the air. Soil should be moist, without overwatering. Removes ammonia, benzene, formaldehyde, and trichloroethylene.

Many of the choices we make have an impact on the environment, from the cars we buy to the food we eat. When making decisions about the plants in our lives, we have the benefit of choosing the greater of benefits. This is the positive magic of negative emissions.

← Previous post
The Value of Green

Next post →
Tuber Time

Search

Recent Posts

  • Signs of Spring March 27, 2021
  • Around the Acres This Week February 2, 2021
  • Around the Acres This Week January 11, 2021
  • Around the Acres This Week December 9, 2020

Mark’s Blog by Month

Ask Mark

  • eNewsletter
  • Radio/Podcast
  • Magazine article
  • Newspaper column
  • TV

Recent Tweets

Mark Cullen Follow

Best selling Canadian gardening author as seen on TV, radio, online and print.

MarkCullen4
2 Mar

Was a pleasure visiting with our #tree loving friends @TonyDiGiovanni1 and @MarkCullen4 today @vinelandrsrch!

Reply on Twitter 1631375315615318018 Retweet on Twitter 1631375315615318018 1 Like on Twitter 1631375315615318018 10 Twitter 1631375315615318018
19 Feb

Increase biodiversity in your yard with these tips from Mark and Ben Cullen. @MarkCullen4

http://ow.ly/u2sE50MVwTA

Reply on Twitter 1627294471200116736 Retweet on Twitter 1627294471200116736 1 Like on Twitter 1627294471200116736 4 Twitter 1627294471200116736
10 Feb

Excited to meet with Mark Cullen and Tony DiGiovanni today to learn more about the Trees for Life Program and how Less Mess can help!

Reply on Twitter 1624161096243240976 Retweet on Twitter 1624161096243240976 4 Like on Twitter 1624161096243240976 6 Twitter 1624161096243240976
12 Jan

This was a great way to start the new year. Congratulations, Landscape Ontario, on this milestone! Thanks to all who made it happen. We’re looking forward to the next one.

#TreesForLife #Congress #LOCongress #ClimateAction #GoGreen #HOHTC

Reply on Twitter 1613670790612017153 Retweet on Twitter 1613670790612017153 5 Like on Twitter 1613670790612017153 5 Twitter 1613670790612017153

Comments are closed.

About Mark and Ben


Mark Cullen is an expert gardener, author & broadcaster and holds the Order of Canada. His son Ben is a fourth-generation urban gardener and graduate of Guelph and Dalhousie University.
More

Find Mark On

Sponsored Links

Highway of Heroes cullensfoods Share Agriculture Foundation Harrowsmith
© Mark Cullen. Go to top ↑