Arbres, CO2 et voitures

Véritable poumon de la terre, la forêt se présente comme une des variables clés du changement climatique. Eviter la déforestation et financer la reforestation permettrait de réduire la quantité de CO2 dans l’atmosphère. Mais combien de CO2 un arbre peut-il stocker ? Et cela est-il suffisant pour limiter les émissions carbone ?

Les arbres, ou comment séquestrer le CO2 naturellement

Les arbres, tout comme les plantes, ont cette capacité fantastique de capter l’énergie lumineuse grâce à la chlorophylle présente principalement dans les feuilles et d’utiliser cette énergie pour transformer l’eau en provenance du sol et le CO2 de l’atmosphère en sucre qui permettra à l’arbre de grandir et libérer de l’oxygène : il s’agit de la photosynthèse. Ce processus de séquestration est naturel.

Au fil du temps, cette biomasse, principalement le tronc et les branches, est la traduction visible de ce processus.  Pendant 30 ans, un pin maritime va par exemple stocker 210 kg de CO2 en France au-dessus du sol, à un rythme moyen de 7kg de CO2 par an. Le CO2 stocké ne se limite en revanche pas à la partie visible de la biomasse, on ne comptabilise pas en général la biomasse contenue dans les racines qui pèse pour 1/4 de la biomasse stockée.

Faire l’hypothèse d’une séquestration moyenne pour un pin maritime en France de10kg de CO2 par arbre et par an est par exemple adapté, soit 300 kg de CO2 sur la durée de vie du peuplement.

En France, chaque essence séquestrant à son rythme, la capacité d’absorption de carbone annuelle des forêts (2/3 feuillus, 1/3 conifères) est estimée à 70 millions de tonnes équivalent CO2 par an, soit 15 % des émissions françaises de gaz à effet de serre.

Eviter la déforestation, pour stocker à long terme la carbone dans le sol

 Derrière l’arbre, la forêt : au fil du temps, les sols forestiers stockent des quantités comparables de carbone que celles des arbres eux-mêmes.

Balladez-vous en forêt et grattez le sol ! Vous verrez que les dix premiers centimètres sont noirs et que les couches inférieures marrons. En effet, les sols forestiers constituent l’un des principaux réservoirs terrestres de carbone. Ses stocks se divisent entre deux compartiments : l’humus (dont la litière), pour 10% et les horizons minéraux (entre 0 et 30 cm de profondeur), pour 90%.

Lorsque l’on détruit une forêt, on relâche le carbone qui a été stocké dans le sol. En 2015, malgré un ralentissement depuis 25 ans du rythme de déforestation, la forêt mondiale continue de perdre 4 millions d’hectares de forêts par an. . La déforestation est ainsi une des premières causes d’émission de CO2 : elle représente 11% des émissions mondiales de gaz à effet de serre !

En cause, les activités humaines : conversion des forêts en champs cultivés (responsable de 73% de la déforestation), puis l’extension des villes (10%), la construction d’infrastructures telles que les barrages, les routes, etc. (10%) et l’extraction minière (7%).

Protéger la forêt est donc tout aussi important que réduire le volume de nos émissions de CO2. Il est urgent de faire les deux !

Utiliser le bois comme matériau de substitution est enfin le dernier levier pour stocker durablement la maximum de carbone.

Planter des arbres quand on roule ?

Pour le climat, peu importe où le CO2 est émis, c’est la quantité de CO2 dans l’atmosphère qui augmente l’effet de serre et engendre le réchauffement de la planète. Si on ne peut pas éviter d’émettre du CO2, il est conseillé de retirer de l’atmosphère la quantité équivalente de CO2 que celle que nous venons d’émettre pour en neutraliser l’impact sur le climat. Ainsi, lorsqu’on ne peut faire autrement que prendre sa voiture, il est donc possible d’agir en finançant par exemple des projets de reforestation (ou de déforestation évitée) qui vont permettre de retirer de l’atmosphère la même quantité de CO2 émise. Une action qui présente de multiples bénéfices parmi lesquels : créer des emplois, protéger la biodiversité, améliorer la qualité de l’air localement.

Certes, le mieux, c’est de ne pas émettre. Mais en attendant, les voitures circulent quand même, c’est un fait. Et cela ne va pas changer du jour au lendemain. Imaginez, si on imposait à chaque conducteur de planter des arbres au fur et à mesure de ses émissions de CO2… l’impact sur le climat en serait profondément changé ! L’Inde, a bien réussi en juillet 2017 à planter 66 millions d’arbres en seulement 12 heures…

Si le 1,5 milliard de voitures plante 3 arbres sur la planète par an, nous annulerons l’impact de la déforestation ! Alors, chiche ?

 

Passionnée de développement durable et de communication, je suis persuadée que c'est avec action concrète et engagement que nous construisons un monde meilleur.

#MakeOurPlanetGreatAgain 

 
60 réponses
  1. Jef VALLOT
    Jef VALLOT says:

    C’est très intéressant, pédagogique et accessible à tous
    C’est ce que je fais pour ma fille qui faisait 20 000 km par an pour aller bosser au CHU de Montpellier.Elle est passée à 15 000 km grâce au covoiturage.
    Moi je viens de publier: « Réchauffement Climatique, c’est Ici et Maintenant », papier et e.book chez bod.fr…un résumé choc de la question en 30 pages
    Merci et bon courage. Jef Vallot

  2. how to get help in windows 10
    how to get help in windows 10 says:

    Hello, i read your blog from time to time and i own a
    similar one and i was just wondering if you get a lot
    of spam responses? If so how do you stop it, any plugin or anything you can recommend?

    I get so much lately it’s driving me mad so any help is very
    much appreciated.

  3. gamefly free trial
    gamefly free trial says:

    Do you mind if I quote a couple of your posts as long as I
    provide credit and sources back to your site? My website is
    in the exact same niche as yours and my visitors would truly benefit from some of the information you
    present here. Please let me know if this ok with
    you. Thanks a lot!

  4. gamefly free trial
    gamefly free trial says:

    Hey terrific website! Does running a blog similar to this take
    a massive amount work? I’ve very little expertise in programming
    however I was hoping to start my own blog soon. Anyways, if you
    have any suggestions or techniques for new blog owners please share.
    I understand this is off topic but I simply needed to ask.

    Cheers!

  5. Alexis Encinas
    Alexis Encinas says:

    Merely wanna comment on few general things, The website layout is perfect, the subject material is very wonderful. « The way you treat yourself sets the standard for others. » by Sonya Friedman.

  6. gamefly free trial
    gamefly free trial says:

    I’d like to thank you for the efforts you’ve put in penning this
    website. I am hoping to see the same high-grade content by you in the future as well.
    In truth, your creative writing abilities has inspired me to get my
    very own website now 😉

  7. gamefly free trial
    gamefly free trial says:

    It’s a pity you don’t have a donate button! I’d certainly donate to this brilliant blog!
    I suppose for now i’ll settle for book-marking and adding
    your RSS feed to my Google account. I look forward to
    brand new updates and will talk about this site
    with my Facebook group. Talk soon!

  8. gamefly free trial
    gamefly free trial says:

    Good day! I could have sworn I’ve visited this site before but after browsing through a few of the
    articles I realized it’s new to me. Nonetheless, I’m certainly delighted I stumbled
    upon it and I’ll be bookmarking it and checking
    back regularly!

  9. gamefly free trial
    gamefly free trial says:

    Hi, i think that i saw you visited my weblog so i came to “return the favor”.I’m trying
    to find things to improve my web site!I suppose its ok
    to use a few of your ideas!!

  10. ps4 2019 games
    ps4 2019 games says:

    hey there and thank you for your information – I have definitely picked up anything new from right here.
    I did however expertise a few technical issues using this website, since I experienced to reload the site lots of times previous to I
    could get it to load properly. I had been wondering if your web hosting is OK?

    Not that I’m complaining, but sluggish loading instances times will often affect your placement in google and can damage your high-quality score if advertising and marketing with Adwords.

    Well I’m adding this RSS to my e-mail and can look out for much more of
    your respective interesting content. Make sure you update
    this again soon.

  11. tinyurl.com
    tinyurl.com says:

    What’s Going down i’m new to this, I stumbled upon this
    I’ve found It positively helpful and it has aided me out loads.
    I’m hoping to contribute & help other users like its helped me.
    Great job.

  12. ps4 best games ever made 2019
    ps4 best games ever made 2019 says:

    The other day, while I was at work, my sister stole my iPad and tested
    to see if it can survive a 25 foot drop, just so she can be a youtube sensation. My apple ipad
    is now broken and she has 83 views. I know this is totally
    off topic but I had to share it with someone!

  13. ps4 best games ever made 2019
    ps4 best games ever made 2019 says:

    Good day! I could have sworn I’ve visited this web site before but after browsing
    through a few of the posts I realized it’s new to
    me. Anyways, I’m definitely happy I found it and I’ll be bookmarking it and checking back frequently!

  14. Daftar sv388
    Daftar sv388 says:

    I have read some good stuff here. Definitely worth bookmarking for revisiting. I wonder how much effort you put to create such a magnificent informative website.

  15. Betting Predictions
    Betting Predictions says:

    Hi, i think that i noticed you visited my web site thus i got here to “go back the want”.I’m trying to to find things to enhance my site!I guess its adequate to make use of a few of your concepts!!

  16. Maids Dubai
    Maids Dubai says:

    I conceive this internet site holds some rattling good info for everyone :D. « Morality, like art, means a drawing a line someplace. » by Oscar Wilde.

  17. Capsa Susun Online
    Capsa Susun Online says:

    I like what you guys are up too. Such intelligent work and reporting! Keep up the superb works guys I have incorporated you guys to my blogroll. I think it’ll improve the value of my site :).

  18. invention advice
    invention advice says:

    Thank you for every other informative blog. The place else could I get that kind of info written in such a perfect manner? I’ve a project that I am simply now operating on, and I’ve been at the glance out for such info.

  19. inventhelp store
    inventhelp store says:

    What i do not realize is if truth be told how you’re not really much more well-liked than you might be now. You are so intelligent. You already know therefore considerably in relation to this topic, produced me for my part believe it from so many varied angles. Its like women and men don’t seem to be involved unless it’s one thing to do with Woman gaga! Your individual stuffs nice. Always deal with it up!

  20. Web design Trinidad
    Web design Trinidad says:

    Thank you so much for providing individuals with remarkably pleasant chance to read articles and blog posts from this site. It is often very fantastic and as well , stuffed with a good time for me and my office fellow workers to search your site really three times weekly to see the new guidance you will have. Of course, we’re usually impressed for the good solutions you give. Selected 3 facts in this posting are absolutely the best we have had.

  21. tinyurl.com
    tinyurl.com says:

    Having read this I believed it was very informative.
    I appreciate you spending some time and effort to
    put this content together. I once again find myself personally spending a significant amount of time both reading and
    leaving comments. But so what, it was still worth it!

  22. Prop Snoop
    Prop Snoop says:

    Hey! This is kind of off topic but I need some guidance from an established blog. Is it very difficult to set up your own blog? I’m not very techincal but I can figure things out pretty quick. I’m thinking about making my own but I’m not sure where to start. Do you have any points or suggestions? Thank you

  23. wholesale hemp buds
    wholesale hemp buds says:

    What i do not understood is in truth how you’re not really a lot more neatly-liked than you might be right now. You’re so intelligent. You recognize therefore considerably in relation to this matter, made me for my part consider it from numerous numerous angles. Its like men and women aren’t fascinated unless it?¦s one thing to do with Woman gaga! Your individual stuffs outstanding. All the time handle it up!

  24. car insurance quotes
    car insurance quotes says:

    Unquestionably believe that which you stated. Your favorite reason appeared to be on the internet the easiest thing to be aware of. I say to you, I definitely get annoyed while people think about worries that they plainly do not know about. You managed to hit the nail upon the top as well as defined out the whole thing without having side effect , people can take a signal. Will likely be back to get more. Thanks

  25. site
    site says:

    Pretty great post. I simply stumbled upon your weblog and wished to mention that I have truly enjoyed surfing around your weblog posts. In any case I’ll be subscribing for your feed and I’m hoping you write again soon!

  26. geico car insurance
    geico car insurance says:

    I’m not sure exactly why but this blog is loading incredibly slow for me. Is anyone else having this issue or is it a issue on my end? I’ll check back later on and see if the problem still exists.

  27. fakultet
    fakultet says:

    you’re really a good webmaster. The web site loading speed is amazing. It seems that you’re doing any unique trick. Furthermore, The contents are masterpiece. you have done a wonderful job on this topic!

  28. original site cbd cannabidiol oil
    original site cbd cannabidiol oil says:

    Good post. I study something more difficult on different blogs everyday. It can always be stimulating to learn content material from other writers and apply slightly one thing from their store. I’d want to make use of some with the content on my blog whether or not you don’t mind. Natually I’ll give you a hyperlink on your web blog. Thanks for sharing.

  29. roofing companies toledo-oh
    roofing companies toledo-oh says:

    Just wish to say your article is as surprising. The clearness on your publish is simply nice and i could assume you’re a professional in this subject. Fine together with your permission let me to grasp your feed to stay up to date with impending post. Thank you 1,000,000 and please carry on the gratifying work.

  30. continue
    continue says:

    I was curious if you ever considered changing the structure of your site? Its very well written; I love what youve got to say. But maybe you could a little more in the way of content so people could connect with it better. Youve got an awful lot of text for only having 1 or two pictures. Maybe you could space it out better?

  31. univerzitet
    univerzitet says:

    What i don’t realize is in fact how you’re now not really much more well-appreciated than you might be now. You’re so intelligent. You realize therefore considerably in relation to this subject, produced me for my part believe it from numerous numerous angles. Its like men and women aren’t involved until it is something to do with Woman gaga! Your own stuffs outstanding. All the time maintain it up!

  32. bra online shop
    bra online shop says:

    When I originally commented I clicked the « Notify me when new comments are added » checkbox and now each time a comment is added I get several e-mails with the same comment. Is there any way you can remove people from that service? Appreciate it!

  33. AMICA quote on car insurance
    AMICA quote on car insurance says:

    Hello there! I know this is kinda off topic but I was wondering if you knew where I could find a captcha plugin for my comment form? I’m using the same blog platform as yours and I’m having trouble finding one? Thanks a lot!

  34. plenty of fish dating site
    plenty of fish dating site says:

    Hey there would you mind letting me know which
    hosting company you’re using? I’ve loaded your blog
    in 3 different web browsers and I must say this blog loads a lot faster then most.

    Can you recommend a good hosting provider at a honest price?
    Thanks, I appreciate it!

  35. Ausflug
    Ausflug says:

    I know this if off topic but I’m looking into starting my own blog and was wondering what all is needed to get set up? I’m assuming having a blog like yours would cost a pretty penny? I’m not very internet smart so I’m not 100 certain. Any suggestions or advice would be greatly appreciated. Thank you

  36. this web site
    this web site says:

    certainly like your website but you have to test the spelling on several of your posts. A number of them are rife with spelling issues and I find it very troublesome to tell the truth however I will surely come again again.

  37. Linux Vps
    Linux Vps says:

    You actually make it seem really easy with your presentation however I to find this topic to be actually one thing which I think I might by no means understand. It seems too complex and extremely extensive for me. I’m taking a look forward in your next put up, I will attempt to get the hold of it!

  38. Corporate black car service from EWR
    Corporate black car service from EWR says:

    Howdy, i read your blog occasionally and i own a similar one and i was just curious if you get a lot of spam remarks? If so how do you reduce it, any plugin or anything you can advise? I get so much lately it’s driving me crazy so any support is very much appreciated.

  39. 인터넷카지노사이트
    인터넷카지노사이트 says:

    hello!,I love your writing very a lot! share we keep up a correspondence more approximately your post on AOL? I require an expert in this house to solve my problem. May be that is you! Taking a look forward to peer you.

Répondre

Want to join the discussion?
Feel free to contribute!

Laisser un commentaire

Votre adresse de messagerie ne sera pas publiée.