Daily Current Affairs : 22-August-2023
In bustling urban spaces, the yearning for greenery often goes unmet. Concrete jungles with their soaring buildings and bustling streets rarely offer respite in the form of lush green canopies. However, in Spain, a unique initiative is transforming the urban landscape by introducing vegetated awnings or canopies. These innovative structures, known as ‘Greenshades,’ are like sails that drape across the facades of buildings, bringing a touch of nature to the heart of the city.
Vegetated Canopies: A Glimpse
Anchored Natural Mimicry
The vegetated canopies, also referred to as ‘Greenshades,’ are tensioned sail-like structures. They are ingeniously anchored to the sides of buildings, mimicking the organic canopies found in lush forests. What makes these canopies truly remarkable is their lightweight design and ease of installation, allowing them to be seamlessly integrated into commercial streets and public spaces where traditional trees or vegetation are often absent.
The Inner Workings
From Substrate to Seed
The magic of Greenshades begins with the careful preparation of sails, anchors, and support structures. A geotextile substrate, or special material, is laid down to create the base. An irrigation system is then installed at the highest point, ensuring that water flows by gravity, gently soaking the entire substrate. To keep the vegetation in perfect condition, a supply of fertilizer is included. Excess water is cleverly collected at the lowest point and directed into a connected drainage system. Then, a seed mixture is projected onto the geotextile. Over the course of approximately four months, the canopy transforms into a verdant haven. These plants grow hydroponically, with dedicated water supply and drainage points.
Advantages: Green Canopies Unleashed
Cooling Effect and Pollution Control
The benefits of vegetated canopies are far-reaching. Firstly, they act as natural air conditioners for urban areas, reducing temperatures both in the immediate vicinity and beneath their cool embrace. This cooling phenomenon is driven by evapotranspiration, where plants release water into the atmosphere, thereby moderating temperatures. Additionally, the plant species chosen for these canopies are experts at absorbing harmful gases, such as carbon monoxide and nitrogen oxide, further enhancing air quality.
Noise Reduction and Oxygen Generation
The advantages don’t stop there. The geotextile substrate also plays a role in reducing noise pollution by absorbing sound waves, creating a more peaceful urban environment. Astonishingly, just one square meter of a vegetated canopy generates enough oxygen to sustain a person for an entire year, while simultaneously acting as a guardian against noxious gases.
Efficient Resource Utilization
These canopies are not just about greenery; they are also smart in their resource utilization. The integrated hanging planters centralize water and light installations. This strategic approach promotes energy savings, as the lights are equipped with motion sensors that adjust illumination according to the street’s needs.
Urban Biodiversity and Ecosystem Health
Furthermore, the adoption of vegetated canopies contributes to the enhancement of urban biodiversity. These green oases attract various wildlife species, creating a healthier ecosystem within the city. This harmonious coexistence of flora and fauna is essential for maintaining ecological balance.
Important Points:
Vegetated Canopies: A Glimpse
- Greenshades are sail-like structures anchored to building facades.
- They mimic natural forest canopies, bringing greenery to urban areas.
- Lightweight and easy installation makes them suitable for commercial streets and public spaces.
The Inner Workings
- Canopies start with a geotextile substrate and irrigation system.
- Water, fertilizer, and seeds are added to promote plant growth.
- Excess water is collected and drained efficiently.
- Hydroponic growth with dedicated water supply and drainage.
Advantages: Green Canopies Unleashed
- Cooling effect due to evapotranspiration.
- Plants absorb harmful gases, improving air quality.
- Noise reduction through sound wave absorption.
- Oxygen generation; 1 square meter sustains a person for a year.
- Efficient resource use with centralized water and light systems.
Urban Biodiversity and Ecosystem Health
- Canopies attract wildlife, contributing to urban biodiversity.
- Promotes a healthier and more sustainable urban ecosystem.
Why In News
One innovative approach aimed at reintroducing greenery into Spain’s urban landscapes entails the installation of lush vegetated awnings or canopies. These green installations not only enhance the aesthetic appeal of the city but also contribute to improved air quality and urban biodiversity.
MCQs about Urban Revival through Vegetated Canopies
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What is the process involved in preparing the vegetated canopies?
A. The canopies are made from steel frames.
B. Plants are directly planted on building facades.
C. A geotextile substrate is used, and an irrigation system is installed.
D. The canopies are pre-fabricated and transported to the site.
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How do vegetated canopies help reduce noise pollution in urban areas?
A. By emitting soothing sounds of flowing water.
B. By blocking all outside noise.
C. By absorbing sound waves through their geotextile substrate.
D. By playing calming music through built-in speakers.
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What additional benefits do vegetated canopies offer beyond shade and greenery?
A. They can be used as advertising billboards.
B. They contribute to urban biodiversity and ecosystem health.
C. They are equipped with built-in seating for pedestrians.
D. They generate electricity from solar panels.
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