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California’s Silent Health Hazard | Earth Wise

April 23, 2021 By EarthWise Leave a Comment

California oil wells a silent public health hazard

For people in the Los Angeles area, it is a familiar sight to see oil wells pumping away on hillsides, in residential neighborhoods, and other places.  In fancier parts of town, oil wells are hidden behind facades located next door to dry cleaners and lamp stores.

Every year, more than 140 million barrels of oil are extracted from the state of California, coming from a vast subterranean formation that spans nearly the entire state along the coast and spreading inland as well.  About 30% of the state’s oil comes from the Los Angeles area.

The oilfields are mostly old, and their wells played out.  As a result, high-tech drilling and a slew of toxic chemicals are needed to extract the last dregs of crude oil.

Unlike more rural oil-producing states, where oilfields might be uninhabited except for the people who work on them, drilling in California happens to a large degree in residential settings.  Over the years, it has become increasingly clear that certain chemical byproducts of oil extraction, among them benzene and hydrogen sulfate, can cause a variety of health problems.  For example, recent research has found connections between exposure to oil and gas well sites and spontaneous pre-term births, low-birthweight babies, and other adverse birth outcomes.

Statewide, little is being done to protect residents and schoolchildren from any of the suspected consequences of living near an oil or gas well.  Regulations are weak and spottily enforced because the oil industry still wields a lot of political power in the state.  Environmental groups and justice advocates are actively seeking to create new protections for California citizens, but it remains an uphill battle.

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The Oil Well Next Door: California’s Silent Health Hazard

Photo, posted July 11, 2017, courtesy of John Ciccarelli / Bureau of Land Management California via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

The U.S. Military And Climate Change

July 9, 2019 By EarthWise Leave a Comment

According to new research by scientists from Durham University and Lancaster University, the United States military is one of the largest climate polluters.  The U.S. military consumes more liquid fuels and emits more greenhouse gases than most countries.  

The study, published in Transactions of the Institute of British Geographers, finds that if the U.S. military were a country, it would be the 47th largest emitter of greenhouse gases in the world, falling between Peru and Portugal.  And this only takes into account the emissions from its liquid fuel consumption.  For this study, the U.S. military’s 2015 consumption was compared with the 2014 World Bank country liquid fuel consumption. 

In 2017, the U.S. military purchased more than 269,000 barrels of oil a day, emitting more than 25,000 kt- CO2e by burning those fuels.  The Air Force accounted for $4.9 billion worth of this fuel, followed by the Navy at $2.8 billion, the Army at $947 million, and the Marines at $36 million. 

The Air Force and the Navy are not only the U.S. military’s largest purchasers of fuel, they also use the most polluting types of fuel.  The Air Force is the largest emitter of greenhouse gases at more than 13,000 kt CO2e, nearly double that of the Navy’s 7,800 kt CO2e. 

Despite this study’s findings and a general uptick in awareness, it’s unlikely that the U.S. military’s dependence on fossil fuels will change.  That’s because the military continues to pursue open-ended operations around the globe, and the lifecycle of its existing military equipment insures dependence on hydrocarbons for many years to come. 

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U.S. military consumes more hydrocarbons than most countries — massive hidden impact on climate

Photo, posted July 8, 2016, courtesy of Alan Wilson via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Plant-Based Jet Fuels

May 9, 2019 By EarthWise Leave a Comment

The global aviation industry uses a whole lot of fuel:  more than 5 million barrels a day.  It is an incredibly energy-intensive industry and almost all of its energy comes from petroleum-based fuels.

While other large energy sectors such as electric power, ground transportation and commercial buildings have well-defined pathways to adopting renewable energy sources, the aviation industry does not have such a straightforward way to make a transition to sustainability.  Electrifying planes using batteries or fuel cells is very challenging for a number of reasons, notably the weight restrictions on aircraft.  So liquid biofuels as replacements for petroleum-based fuels remain the most promising approach.

A new study at the Lawrence Berkeley National Laboratory concludes that sustainable plant-based biofuels could provide a competitive alternative to conventional petroleum fuels if current development and scale-up initiatives are successful.

Multidisciplinary teams based at the Department of Energy’s Joint BioEnergy Institute are focused on optimizing each stage of the bio-jet fuel production process.  This includes bioengineering ideal source plants and developing methods for efficiently isolating the carbohydrates in non-food biomass that bacteria can digest and bioconvert into fuel molecules.

The critical issue is cost.  The theoretical cost of bio-jet fuel has come down dramatically in recent years but is still around $16 a gallon.  The cost of standard jet fuel is about $2.50 a gallon.  So, the real challenge is bridging that gap.

Reducing the cost of the fuel could come both from the material and process improvements that are underway as well as by finding ways to turn the leftover lignin residuals from the bioconversion process into valuable chemicals. 

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Bright Skies for Plant-Based Jet Fuels

Photo, posted March 28, 2009, courtesy of Yasuhiro Chatani via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Who Needs Aedes Mosquitoes?

March 29, 2016 By WAMC WEB

https://earthwiseradio.org/wp-content/uploads/2016/03/EW-03-29-16-Aedes-Threat.mp3

There are approximately 3,500 mosquito species in the world. Of those, only a few hundred are known to bite humans. And just two have adapted to breed almost exclusively in urban environments where they are in close proximity to people.

[Read more…] about Who Needs Aedes Mosquitoes?

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