N23 Evaluate success of strategies to reduce air pollution on people Flashcards
`Intro
Air pollution is a significant environmental issue that adversely affects public health, particularly in urban areas.
Mexico City, one of the largest and most densely populated cities in the world, faces severe air quality challenges due to its high levels of vehicle emissions and industrial activity.
This essay will evaluate the success of three strategies implemented in Mexico City to reduce the impacts of air pollution on its residents; the “Hoy No Circula” program, the expansion of public transportation, and the implementation of green roofs.
Hoy No Circula
Point, evidence
The “Hoy No Circula” program is a vehicle restriction initiative aimed at reducing air pollution by limiting the number of cars on the road based on licence plate numbers.
Introduced in 1989, this program led to a reported 14% decrease in PM10 levels during its implementation periods.
While the “Hoy No Circula” program has shown some success in lowering emissions, its overall effectiveness is questionable.
Hoy No Circula
Explanation
Many residents avoid the restrictions by using alternative vehicles or driving during exempt hours.
Additionally, the increasing number of vehicles in Mexico City continues to challenge the program’s goals.
Therefore, despite its initial success, the program’s limitations highlight the need for more public compliance to achieve lasting improvements in air quality in the long run.
Metrobus
Point, evidence
The expansion of public transportation systems, particularly the Metrobus, is another crucial strategy aimed at reducing air pollution in Mexico City.
The Metrobus, introduced in 2005, has over 1 million passengers per day, resulting in an estimated reduction of 200,000 tons of CO2 emissions annually.
Despite 15% of users owning a car, they prefer to travel by Metrobus, which has reduced exposure to air pollution by 35%.
Metrobus
Explanation
By providing efficient alternatives to private car use, these transportation systems have significantly contributed to reducing emissions and traffic congestion.
However, challenges such as overcrowding and limited coverage in certain areas persist, which may deter potential users.
Therefore, while the expansion of public transportation has made substantial improvements in air quality, investments are essential to encourage further use among residents.
Azoteas Verdes
Point, evidence
The implementation of green roofs is another innovative strategy aimed at improving air quality and enhancing urban sustainability in Mexico City.
The azoteas verdes project increased the total area of green roofs in hospitals, schools and government buildings to over 20,000 square metres in 2014.
These green roofs not only help filter pollutants but also mitigate the urban heat island effect and reduce runoff.
Azotea Verdes
Explanation
By enhancing biodiversity and providing recreational spaces, azoteas verdes contribute positively to the urban environment.
However, their success depends on ongoing maintenance and effective integration into urban planning.
Thus, while the azoteas verdes project has shown promising results in improving air quality, their long-term effectiveness relies on continued investment and public awareness.
