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| report:sus [2026/03/30 10:45] – [5.5 Social] team5 | report:sus [2026/04/26 18:56] (current) – [5.3 Environmental] team5 |
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| ===== 5.3 Environmental ===== | ===== 5.3 Environmental ===== |
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| The project's environmental footprint is optimized through a high power-to-impact ratio. Operating at a peak consumption of 15 – 25 W during active interaction and dropping to a 3 W when idle, the installation uses approximately 70 % less energy than traditional neon or incandescent public displays [(tsao2010led)]. With an estimated operational carbon intensity of about 7.3 kg CO<sub>2</sub> equivalent per year based on Portugal's emissions [(ren_datahub)], the installation represents a significant reduction in emissions compared to high-intensity digital signage. Furthermore, the selection of PLA over ABS plastic results in a 60 % reduction in CO<sub>2</sub> emissions during the manufacturing phase, prioritizing bio-based feedstocks over petroleum derivatives [(RezvaniGhomi2021)]. | The project's environmental footprint is optimized through a high power-to-impact ratio. Operating at a peak consumption of 15 W – 25 W during active interaction and dropping to a 3 W when idle, the installation uses approximately 70 % less energy than traditional neon or incandescent public displays [(tsao2010led)]. With an estimated operational carbon intensity of about 7.3 kg CO<sub>2</sub> equivalent per year based on Portugal's emissions [(ren_datahub)], the installation represents a significant reduction in emissions compared to high-intensity digital signage. Furthermore, the selection of Polylactic Acid (PLA) over Acrylonitrile Butadiene Styrene (ABS) plastic results in a 60 % reduction in CO<sub>2</sub> emissions during the manufacturing phase, prioritizing bio-based feedstocks over petroleum derivatives [(RezvaniGhomi2021)]. |
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| However, a complete environmental picture must also account for the production and end-of-life stages of the project's components. The manufacturing of electronic hardware: sensors, microcontrollers, and lighting elements, typically involves the extraction of rare earth minerals and metals, processes that are resource-intensive and geographically concentrated in regions with significant environmental and labour concerns [(mancheri2019rare)]. While the quantity of materials used in this prototype is small, scaling the installation across multiple metro poles and carriages would proportionally increase this upstream environmental burden. Similarly, synthetic materials used in the structural and handle elements of the installation are petroleum-derived, carrying an embedded carbon cost from their production. | However, a complete environmental picture must also account for the production and end-of-life stages of the project's components. The manufacturing of electronic hardware: sensors, microcontrollers, and lighting elements, typically involves the extraction of rare earth minerals and metals, processes that are resource-intensive and geographically concentrated in regions with significant environmental and labour concerns [(mancheri2019rare)]. While the quantity of materials used in this prototype is small, scaling the installation across multiple metro poles and carriages would proportionally increase this upstream environmental burden. Similarly, synthetic materials used in the structural and handle elements of the installation are petroleum-derived, carrying an embedded carbon cost from their production. |
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| * **Cultural Capital:** By enhancing the "experiential value" of the commute, the project may improve rider satisfaction and encourage people to use public transport hence reduce carbon footprint. | * **Cultural Capital:** By enhancing the "experiential value" of the commute, the project may improve rider satisfaction and encourage people to use public transport hence reduce carbon footprint. |
| * **Indirect Benefits:** High-quality public environments are linked to increased ridership and reduced vandalism. [(whitehead2006value)] | * **Indirect Benefits:** High-quality public environments are linked to increased ridership and reduced vandalism [(whitehead2006value)]. |
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| ===== 5.5 Social ===== | ===== 5.5 Social ===== |
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| The social dimension of this project is easily its most significant contribution. Modern urban life is defined by a weird paradox: we are more digitally connected than ever, yet feelings of loneliness and social isolation in public spaces are actually growing [(Turkle2011)]. The metro is the perfect example of this contradiction hundreds of people packed into a tiny space, shoulder to shoulder, yet every single person is absorbed in their own private digital world. This project disrupts that "together alone" dynamic by taking the handrail, one of the most mundane and universally shared touchpoints in the city, and turning it into a medium for spontaneous, visible, and playful social interaction. | The social dimension of this project is easily its most significant contribution. Modern urban life is defined by a weird paradox: we are more digitally connected than ever, yet feelings of loneliness and social isolation in public spaces are actually growing [(Turkle2011)]. The metro is the perfect example of this contradiction: hundreds of people packed into a tiny space, shoulder to shoulder, yet every single person is absorbed in their own private digital world. This project disrupts that "together alone" dynamic by taking the handrail, one of the most mundane and universally shared touchpoints in the city, and turning it into a medium for spontaneous, visible, and playful social interaction. |
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| The mechanic is deliberately simple and requires zero prior knowledge, tech literacy, or even a conscious decision to "participate." A commuter touches a pole and sees their unique color travel upward to the ceiling; another commuter does the same, and the two colors meet and blend overhead. This moment of shared visual experience creates an implicit social connection between strangers, one that is fleeting, non-verbal, and non-threatening, yet nonetheless meaningful. By making the invisible visible, the simple fact that two people are sharing the same space at the same moment the installation gently reminds commuters of their shared humanity in an environment that typically encourages total withdrawal. | The mechanic is deliberately simple and requires zero prior knowledge, tech literacy, or even a conscious decision to "participate." A commuter touches a pole and sees their unique color travel upward to the ceiling; another commuter does the same, and the two colors meet and blend overhead. This moment of shared visual experience creates an implicit social connection between strangers, one that is fleeting, non-verbal, and non-threatening, yet nonetheless meaningful. By making the invisible visible, the simple fact that two people are sharing the same space at the same moment, the installation gently reminds commuters of their shared humanity in an environment that typically encourages total withdrawal. |
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| This approach directly supports global goals for urban health and community building: | This approach directly supports global goals for urban health and community building. The SDG which Connect supports are shown in Table {{ref>sus:sdg}}. |
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| | <table sus:sdg> |
| | <caption>Sustainable development goals which are supported by Connect</caption> |
| | <WRAP round box center 600px> |
| ^ SDG Goal ^ Direct Impact ^ | ^ SDG Goal ^ Direct Impact ^ |
| | **SDG 3 (Good Health)** | Fostering incidental social interaction in everyday environments contributes to reduced loneliness, improved mood, and better mental health outcomes. | | | **SDG 3 (Good Health)** | Fostering incidental social interaction in everyday environments contributes to reduced loneliness, improved mood, and better mental health outcomes. | |
| | **SDG 11 (Sustainable Cities)** | Reimagines transit infrastructure as a canvas for human connection, providing safe and inclusive public spaces that foster community cohesion. | | | **SDG 11 (Sustainable Cities)** | Reimagines transit infrastructure as a canvas for human connection, providing safe and inclusive public spaces that foster community cohesion. | |
| | </WRAP> |
| | </table> |
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| Importantly, the installation is radically inclusive. It doesn't require a smartphone, an app, or a digital account. It is activated simply by touch; an action available to every metro user regardless of their age, background, income, or technical skill. This universality is essential to its social impact: any intervention designed to foster connection must itself be free of barriers to participation. Over time, the cumulative effect of these small, shared moments has the potential to contribute to a subtle but meaningful shift in the social atmosphere of the metro; moving it from a space of isolated transit to one of collective, shared urban life. | Importantly, the installation is radically inclusive. It doesn't require a smartphone, an app, or a digital account. It is activated simply by touch; an action available to every metro user regardless of their age, background, income, or technical skill. This universality is essential to its social impact: any intervention designed to foster connection must itself be free of barriers to participation. Over time, the cumulative effect of these small, shared moments has the potential to contribute to a subtle but meaningful shift in the social atmosphere of the metro; moving it from a space of isolated transit to one of collective, shared urban life. |
| <table lca-cradle> | <table lca-cradle> |
| <caption>Raw Material Extraction Specifications</caption> | <caption>Raw Material Extraction Specifications</caption> |
| <WRAP round box leftalign 800px> | <WRAP round box center 800px> |
| ^ Component ^ Technical Specifications ^ Chemical Composition ^ | ^ Component ^ Technical Specifications ^ Chemical Composition ^ |
| | Electronics | Extraction for Printed Circuit Board (PCB) traces and microcontrollers. | Au, Cu, Ag, Si | | | Electronics | Extraction for Printed Circuit Board (PCB) traces and microcontrollers. | Au, Cu, Ag, Si | |
| <table lca-manufacturing> | <table lca-manufacturing> |
| <caption>Manufacturing Processes and Emissions</caption> | <caption>Manufacturing Processes and Emissions</caption> |
| <WRAP round box leftalign 800px> | <WRAP round box center 800px> |
| ^ Process ^ Environmental Impact ^ Technical Notes ^ | ^ Process ^ Environmental Impact ^ Technical Notes ^ |
| | PCB Assembly | High-thermal energy consumption. | Localized Volatile Organic Compound (VOC) emissions from reflow. | | | PCB Assembly | High-thermal energy consumption. | Localized Volatile Organic Compound (VOC) emissions from reflow. | |
| <table lca-transport> | <table lca-transport> |
| <caption>Logistics and Carbon Footprint</caption> | <caption>Logistics and Carbon Footprint</caption> |
| <WRAP round box leftalign 800px> | <WRAP round box center 800px> |
| ^ Stream ^ Logistics Overview ^ Carbon Implications ^ | ^ Stream ^ Logistics Overview ^ Carbon Implications ^ |
| | Inbound | Global sourcing (East Asia) to assembly. | High freight dependency. | | | Inbound | Global sourcing (East Asia) to assembly. | High freight dependency. | |
| <table operational-durability> | <table operational-durability> |
| <caption>Operational Requirements and Structural Durability</caption> | <caption>Operational Requirements and Structural Durability</caption> |
| <WRAP round box leftalign 800px> | <WRAP round box center 800px> |
| ^ Performance Factor ^ Operational Requirement ^ Ecological/Maintenance Impact ^ | ^ Performance Factor ^ Operational Requirement ^ Ecological/Maintenance Impact ^ |
| | Energy Consumption | Continuous sensor polling and LED illumination. | Cumulative "vampire load" across fleet. | | | Energy Consumption | Continuous sensor polling and LED illumination. | Cumulative "vampire load" across fleet. | |
| <table material-challenges> | <table material-challenges> |
| <caption>Materials Disposal Challenges and Environmental Impacts</caption> | <caption>Materials Disposal Challenges and Environmental Impacts</caption> |
| <WRAP round box leftalign 800px> | <WRAP round box center 800px> |
| ^ Component ^ Disposal Challenge ^ Environmental Impact ^ | ^ Component ^ Disposal Challenge ^ Environmental Impact ^ |
| | PLA Housing | Requires industrial composting (>58 °C). | Low impact if processed; landfill persistence. | | | PLA Housing | Requires industrial composting (> 58 °C). | Low impact if processed; landfill persistence. | |
| | PCB & Sensors | Contains heavy metals (Lead, Arsenic). | Requires certified E-waste recycling facilities. | | | PCB & Sensors | Contains heavy metals (Lead, Arsenic). | Requires certified E-waste recycling facilities. | |
| | LEDs | Small form factor; contain toxic elements. | Frequently missed in bulk recycling streams. | | | LEDs | Small form factor; contain toxic elements. | Frequently missed in bulk recycling streams. | |
| </WRAP> | </WRAP> |
| </table> | </table> |
| The "Grave" phase analysis utilizes the Avoided Burden approach. While PLA is bio-based, it is not "home compostable"; without industrial facilities maintaining temperatures >58 °C, it behaves similarly to conventional plastic in a landfill. The most significant environmental gain in this phase comes from the circularity of the electronics. By utilizing certified E-waste recycling, we "credit" the system with the avoided energy of primary copper and gold mining, effectively reducing the net GWP by approximately 15 % compared to a scenario of 100 % landfilling. | The "Grave" phase analysis utilizes the Avoided Burden approach. While PLA is bio-based, it is not "home compostable"; without industrial facilities maintaining temperatures > 58 °C, it behaves similarly to conventional plastic in a landfill. The most significant environmental gain in this phase comes from the circularity of the electronics. By utilizing certified E-waste recycling, we "credit" the system with the avoided energy of primary copper and gold mining, effectively reducing the net GWP by approximately 15 % compared to a scenario of 100 % landfilling. |
| ===== Summary ===== | ===== Summary ===== |
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