Read the following excerpt from a journalistic feature on urban sustainability in Colombia:
In the metropolitan valley of Medellín, municipal urban planners and community botanists have instituted the Green Corridors initiative to combat severe urban heat island effects. By transforming thirty transit thoroughfares and decommissioned rail verges into interconnected vegetal pathways, the project integrates dozens of native tree species with multi-tiered shrub understories. Recent meteorological data indicates that ambient temperatures along these vegetated avenues have dropped by up to 3.5 degrees Celsius, alongside measurable reductions in particulate matter concentrations. Beyond ecological cooling, the network connects fragmented peripheral neighborhoods with the urban core, creating accessible pedestrian trails and public gathering zones. Municipal authorities emphasize that long-term maintenance relies on neighborhood civic squads trained in horticultural stewardship, ensuring community ownership of the infrastructure. While initial capital expenditure required significant reallocation of municipal transport funds, urban economists note that the long-term public health savings and decreased cooling energy demands significantly outweigh the upfront installation costs. Ultimately, the network demonstrates that nature-based urban design can simultaneously mitigate climate vulnerabilities, restore urban biodiversity, and foster socioeconomic equity across divided metropolitan landscapes.
Based on the journalistic article above, which of the following statements best synthesizes the primary main idea?
- AThe Green Corridors initiative has successfully lowered ambient valley temperatures by 3.5 degrees Celsius through the introduction of native tree species along thirty transit avenues.
- Medellín's interconnected green corridor project combines ecological infrastructure with community engagement to address urban climate risks while promoting public health and social integration.Answer
- CMunicipal authorities plan to eliminate all vehicular transit routes across the metropolitan valley to replace them permanently with pedestrian-only botanical parks.
- DReallocating municipal transport funding to environmental projects is universally recognized by economists as the most cost-effective method to resolve metropolitan inequality.