1. Green Machine
  2. Presenter’s INNOVATETOMITIGATE
  3. The Carboneers
  1. Ali S
  2. Presenter’s INNOVATETOMITIGATE
  3. The Carboneers
Judges’
Choice
Public
Choice

Judges’ Queries and Presenter’s Replies

  • Icon for: Brian Drayton

    Brian Drayton

    Judge
    February 24, 2015 | 03:26 p.m.

    Interesting, and a fun presentation.
    A couple of questions that you may have thought of, but not had room to discuss:
    1. Do you mean 58 million tons of C absorbed?
    2. How often would you need to harvest the grass to reach this amount?
    3. How would mixing in legumes affect the amount of biomass per sq meter?

  • Icon for: Green Machine

    Green Machine

    Presenter
    February 25, 2015 | 08:22 a.m.

    Hello. Thank you for the comments.
    No, we intend 58 tons and not million tons. That is due to the fact that 1000 cars absorb 0.46 tons yearly, not each individual car.
    An acceptable amount is once every two to three weeks.
    The main goal of mixing in legumes is to eliminate the need for fertilization by fixating Nitrogen in the soil. The biomass is slightly decreased according to some sources, (Grass grows with more density) However the fact that they eliminate fertilization needs and encourage healthy growth makes sowing a limited amount of them worthwhile, despite the fact they are a bit tougher than grass to maintain.
    Thank you,
    The Carboneers

  • February 24, 2015 | 03:27 p.m.

    Hello Karim and Ali, Excellent idea! …greening the roofs of vehicles! Your video is wonderful, very entertaining and informative. I especially like your quantitative assessment of your innovation, that you’ve calculated the potential for carbon uptake.

    In your poster, you list some of the “cons” of the Green Roof innovation. I am wondering about two other potential “cons:” water & light. How will you keep your green roof from drying out on long road trips? How will you provide light to vehicles that spend much of their time in the shade of trees or large buildings, or in garages?

  • Icon for: Green Machine

    Green Machine

    Presenter
    February 25, 2015 | 08:07 a.m.

    Hello! Thank you for the comments.
    The beauty of the green roof is in its flexibility, and practicality, as it can be creatively modified very easily by its user. For example, a bottle that periodically or manually releases water can be attached to the roof, or built in. If that is not feasible, simpler alternatives can be adopted, such as stopping occasionally and supplying it with water, or just leaving it at home, where there might be somebody to cater for its needs. It all depends on the length and conditions of the trips.
    As for your second question, we mentioned in our poster that the green roof is generally attached to the car, thus it is mobile and can be removed if the car is exposed to complete darkness. It can be stored in a suitable area until it is needed, or until the car is exposed to the required conditions The grass can indeed tolerate light shade however, so shade generally will not impede it. Our figures are also slightly lower than many of our sources to make up for such inconvenience.
    Thank you,
    The Carboneers

  • Icon for: Gillian Puttick

    Gillian Puttick

    Judge
    February 24, 2015 | 04:08 p.m.

    Interesting project, and an engaging presentation. You obviously put a lot of thought into thinking about the impact of this method if it was scaled. I was wondering if you’d thought about how to harvest the grass efficiently and conveniently? And how much grass an individual vehicle might need to make it carbon neutral?

  • Icon for: Green Machine

    Green Machine

    Presenter
    February 25, 2015 | 08:38 a.m.

    Hello! Thank you for the comments.
    The grass can be cut using traditional methods, allowing the grass to fall into the soil, which will not harm the soil or growing grass. Alternatively, the tray can be taken off the car and the grass can be collected for other uses.
    According to http://www.epa.gov/, the average passenger car releases 4.7 tons of CO2 (over 99% of a car’s carbon emissions), which is 1.25 tons of carbon. As 1000 cars with their green roofs absorb around 0.46 tons yearly, slightly more than 4000 cars will neutralize the yearly carbon production of one car. This is a strong amount relative to the cheapness and practicality of the method, and the fact that car roofs generally wasted spaces.
    Thank you,
    The Carboneers

  • Icon for: Sara Lacy

    Sara Lacy

    Judge
    February 25, 2015 | 05:19 p.m.

    A very attractive idea. I’m wondering about the weight of a 4 square meter tray of soil and grass. Have you estimated the weight? Will this pose problems in getting the tray on and off the roof? Would it reduce gas mileage?

  • Icon for: Green Machine

    Green Machine

    Presenter
    February 26, 2015 | 01:20 p.m.

    Hello. Thank you for the comments.
    The setup is primarily soil, hence this accounts for most of the mass. Assuming the density of the taken soil is 1.2g/cm3, the height of it is 1.5cm, then this will give us a mass of 72kg approximately. The container’s mass is near negligible, and that of the grass depends on may factors, however the overall setup should not exceed 80 kg. It can be carried by a couple of people without too much hassle, although its displacement does not occur too frequently. Alternatively, we have also constructed a different model (Not for this purpose) in which the tray is not one large tray, but is subdivided into many mini trays, approximately 8 trays of different herbs. (We were checking the project on herbs) This can be done with grass though. That would give each tray a mass of around 10kg.In this scenario, the trays can be loaded and unloaded separately without difficulty.(That’s what I meant by the creativity and flexibility of the selected method.)
    This is the around the weight of an additional passenger, which reduces the mileage by 1.5% according to http://www.fueleconomy.gov/. Such a change might affect the total efficiency of the method by a limited percentage. (Which is why we used numbers less than those of most our sources, in case of other factors such as extra mass, air resistance…)
    Thank you,
    The Carboneers

  • Icon for: Joni Falk

    Joni Falk

    Judge
    February 27, 2015 | 08:51 a.m.

    I enjoyed this. Thanks! If you were on shark tank, how would you sell this idea so that it would be adopted by the public at large? Do you think this could catch on? And if not, why not?

  • Icon for: Green Machine

    Green Machine

    Presenter
    February 27, 2015 | 09:08 a.m.

    Hello! Thank you for the comments!
    Sorry, I did not understand what you mean by shark tank, may you please clarify?
    In our vision, the idea has potential for development in many ways and sectors. For example, it can be implemented on large trucks in industry. The owners of these vehicles will surely not mind the aesthetic effect, perhaps finding welcome. The grass harvested can also be used economically!
    As for the public, this method will surely be welcome by environmentalists as a way not only to aid the environment, but to distinguish themselves in a unique “eco-style.” Another possibility is car companies integrating this roof in the making and cost of the car, which will not affect the prices by a great degree.
    But in the end, it all depends on public awareness which is the primary factor in the “masses’” willingness to adopt this method.
    Thank you,
    The Carboneers

  • Further posting is closed as the competition has ended.

Presentation Discussion
  • Small default profile

    Anonymous

    Guest
    February 26, 2015 | 02:42 p.m.

    Great job, Carboneers! Really impressed with your conversions to scale from one green roof to potential sequestration if many many implemented the innovation. Love the song, as well.

    Did you all think about the increased drag on the car, and how the increased emissions from lower fuel economy might compare with uptake from the roof? Thanks!

  • Icon for: Green Machine

    Green Machine

    Presenter
    February 27, 2015 | 12:00 a.m.

    Thanks for viewing our video and poster! Indeed we have though of those, and they are part of the cons section of our poster. Aditionally, we have reduced our statistics by a certain ratio to compensate for any inefficiency caused by the method:)

  • Further posting is closed as the competition has ended.