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Assessing the PM2.5 impact of biomass combustion in megacity Dhaka, Bangladesh - PubMed (nih.gov)

This article is about crop burning in Dhaka, Bangladesh and attempts to figure out if there is more or less harmful PM2.5 particulate air pollution caused by either fossil fuels or biomass, and during which season is one or the other higher in the air pollution it produces. During monsoon season, fossil fuels lead in the most PM2.5 releases at 44.3%. When it is not monsoon season and is the winter season, the percentages are way higher for PM2.5 air particulate releases at 41.4% for the remainder of the year. Across the globe, there are now people stepping up to uncover the true and real environmental and health impacts this harmful particulate byproduct causes in different parts of the world and with differring weather conditions than what we see in North Carolina. 

https://www.researchgate.net/publication/351209404_PM25_Emissions_from_…;

This study is set in South/Southeast Asia and uncovering that, when trying to count the percentages of PM2.5 put off during biomass, the true amount of emissions were being gravely undercalculated. Specifically rice straw burning becuase the amount burned varied so much because of different harvest and burning practices that it just wasn't taken into consideration. What this study does is go bottom up using these strategies: "subnational spatial database of rice-harvested area, region-specific fuel-loading factors, region, and burning-practice-specific emission and combustion factors, including literature-derived estimates of straw and stubble burned"(Lasko et al. 2021, 1). 

The most common air pollutants are called criteria pollutants and are regulated by the Clean Air Act and the EPA. These pollutants are: particles, ozone, nitrogen oxides, sulfer dioxide, carbon monoxide, and lead. The EPA have sections under the CAA that help regulate factories and air pollution in the environment. For example section 108 requires the EPA to identify the pollutants that are criteria pollutants, listed above, and determine if where they are coming from and if they "endander public health or welfare". Under section 109 the EPA had to set standards across the board for air pulltion in regard to human health and to the environemtn sperately (Christopher D. Ahlers 2016, 51-52).  There are many more sections that go into detail about what the CAA can do and what the EPA members are required to do as well. 

As a participant in the NOLA Anthropocene Campus, I have gained insights on how communities, stewards, and managers of ecosystems in New Orleans have rolled out forms of interspecies care vis-à-vis ongoing environmental changes, coastal erosion, climate catastrophes and their deeply present and current effects (i.e., the 2010 BP oil disaster). Whilst much analytical lens has been given to geospatial changes in the study of the Anthropocene, here, I focus on how relations to non-human beings, also threatened by the changing tides of NOLA’s waterscapes, can enrich our understanding of such global transformations.

After disasters like Katrina, urban floodwaters harbored many hidden perils in the form of microbes that cause disease. Pathogenic bacterial exposure occurred when wastewater treatment plants and underground sewage got flooded, thus affecting the microbial landscape of New Orleans and increasing the potential of public health risks throughout Southern Louisiana. But one need not wait for a disaster event like Katrina to face these perils. Quotidian activities like decades of human waste and sewage pollution have contaminated public beaches now filled with lurking microbes. Even street puddle waters, such as those found on Bourbon Street, contain unsanitary bacteria level from years of close human exploitation of horses and inadequate drainage in 100-year old thoroughfares. More recently, microbial ecologies have also changed in the Gulf of Mexico due to the harnessing of energy resources like petroleum. Lush habitats for countless species are more and more in danger sounding the bells of extinction for the imperiled southern wild.

Human-alteration has severely damaged the wetland marshes and swamps that would have protected New Orleans from drowning in the water surge that Hurricane Katrina brought from the Gulf of Mexico. The latter is something that lifelong residents (i.e., indigenous coastal groups) of the Mississippi River Mouth have been pointing to for a  long time. Over the past century, the river delta’s “natural” infrastructure has been altered by the leveeing of the Mississippi River. Consequently, much of the silt and sediments that would generally run south and deposit in the river mouth to refeed the delta get siphoned off earlier upstream by various irrigation systems.

While some actors see it as a futile effort, there have been many proposals to restore the Mississippi River Delta. For instance, the aerial planting of mangrove seeds has even been recommended to help protect the struggling marshes and Louisiana’s coastal region. Tierra Resources, a wetland’s restoration company, proposed that bombing Lousiana’s coast with mangrove seeds could save it. Mangrove root systems are especially useful in providing structures to trap sediments and provide habitats for countless species. Additionally, mangroves have been touted as highly efficient species in carbon sequestration, thus taking carbon dioxide out of the biosphere.

Species diffusion into new environments has been of great concern for the different lifeways these soggy localities sustain, whether human or non-human. Many so-called “invasive species” have been identified throughout the river delta by researchers at the Center for Bioenvironmental Research hosted by Tulane and Xavier University. Such species have disrupted local ecological relations and practices and have had profound economic effects. Some plants have even entirely blocked waterways in the swamps and estuaries where salt and freshwater mix. 

Louisiana’s humid subtropical climate, and the diverse ecosystems therein, also warrant attention in that they can incubate some of the world’s deadliest parasites and other microbes. Of particular concern would be some of today's Neglected Tropical Diseases (i.e., Chagas, Cysticercosis, Dengue fever, Leishmaniasis, Schistosomiasis, Trachoma, Toxocariasis, and West Nile virus) often perceived as only affecting tropical regions of Latin America and revealing the enduring legacies of colonial health disparities.

How and when are seemingly quotidian events and upsets understood as not isolated but rather as produced in conjunction with other anthropocenics worldwide? What roles will interspecies relations and forms of care play as we cope with further anthropocenic agitation?

NOLA’s oldest tree, McDonogh Oak in City Park, 800 years old: https://www.youtube.com/watch?v=DK9YoGpng_c&t=0s

Other trees in New Orleans: https://www.atlasobscura.com/things-to-do/new-orleans-louisiana/trees