Waste is a term that covers many materials. There is what might be called household
waste: the stuff we place in the garbage collection containers to be trucked
away each week. Then there are the body
excretions to be disposed of and industrial wastes from unsold clothing to
radioactive wastes from nuclear reactors.
Oliver Franklin-Wallis discusses them all in his book . Here, we will focus on the household stuff we
throw away.
The method of disposing of unwanted objects has
traditionally been to just dump them far enough away from where we resided so
that we could forget about them. As
population density increased, a bit of planning became necessary. Societies would establish formal dumpsites
and control how much could be accumulated before a new site must be
established. The term landfill came to
be used for planned dumpsites. Large-scale
accumulations of garbage initiate serious environmental problems.
“Today the solid waste industry
contributes 5 percent of all global greenhouse gas emissions—more
than the entire shipping and aviation industries combined. As it decomposes, rubbish produces methane, a
potent greenhouse gas that traps many times more heat than carbon dioxide. Landfills ooze leachate, a waste industry
term for the noxious black or yellow sludge that forms from the putrefying rubbish. Leachate is a noxious smoothie of every
chemical and by-product you can imagine—acids, heavy metals, polychlorinated
biphenyls (PCBs), dioxins, and other poisons and carcinogens, which can leak
down into the water table or into rivers, and into our water supply.”
Franklin-Wallis takes the reader to waste dumping gone insane
in India at New Delhi.
“This is Ghazipur landfill, a
mountain not of stone, but of garbage—14 million metric tons of it. Piled 71 yards high and covering an area of
69 acres, it is the largest of three mega-landfills that ring Delhi.”
This dump site is actually an example of
recycling as thousands of people try to make a living out of salvaging things
from the mountain of garbage.
“Worldwide, 37 percent of
our waste is landfilled, according to the World Bank; fully another third ends
up in open dumpsites. Waste management
is expensive…whereas dumping costs virtually nothing, so, as the global
population has boomed, mega-dumps like Ghazipur have proliferated.”
If one wishes to have modern, ecologically
sound landfills, one can contain the waste in barriers that prohibit leakage of
waste, but barriers don’t last forever, and this process only delays the
inevitable poisoning of the environment.
Countries that can afford waste management add incineration
and recycling to the menu of options, with each choosing its own mixture of
options. Some have found incineration
attractive because it can be done in such a way that useful energy can be
captured in so called “energy-from-waste” (EfW) sites.
“In the UK and Europe, at least,
landfills are a dying business. (The
same is not true in the US or Australia, which send 50 percent and 30 percent
of waste to landfill, respectively.) In
1996, the UK government introduced a landfill tax, to encourage recycling rates…Anything
that cannot be sent for recycling or composted is increasingly burned inside
energy-from-waste (EfW) plants.”
“The reason for landfill’s
decline is not, as was once feared, that we are running out of room for them
(quite the contrary—empty land is easy to find). Rather they have become obsolete, unable to
compete with recycling and energy generation on cost, as well as politically
unpopular.”
“In the UK, the percentage of
waste that ends up burned has grown from 9 percent in 2001 to 48 percent in
2021—a 435 percent increase.
In the European Union, which burns just over a quarter of its trash,
incinerators power 18 million homes.
Sweden burns roughly 50 percent of its waste, Japan 78 percent. Denmark, which burns four-fifths of its
household waste, has built so many EfW plants that the country now has to
import 1 million metric tons of waste per year to keep them running effectively. China, which has built more than 300 EfW
plants since the 1990s, burns 580,000 metric tons of rubbish every day.”
Incineration seems a curious form of waste management
progress when global warming is becoming a more urgent issue. And burning garbage can emit all sorts of
dangerous chemicals if not highly regulated.
Modern systems try to burn at a high enough temperature that dangerous
compounds can be decomposed.
Nevertheless, it cannot be considered a clean energy source, and people
who live near incinerators tend to have worse health problems than people who
do not.
“Even so, incinerators’
emissions are substantial: in the UK, energy-from-waste plants have been found
to emit more CO2-equivalent per kilowatt hour generated than coal power
stations while regulators in New York found that even incinerators that comply
with air quality legislation can release up to twice as much lead, four times
as much cadmium, and up to fourteen times as much mercury as coal.”
The roughly third of waste that does not get deposited on
land is divided between incineration and recycling. Both options depend on companies being able
to make money in the process. Therefore,
market forces will arise and the two modes will be in competition. Recycling will be economically efficient for
some materials and less so for others.
Plastics will be the major problem.
“The environmental benefits of
recycling are manifold. Recycling an
aluminum can requires roughly 92 percent less energy and emits 90 percent less
carbon than making one from virgin material; for every ton of aluminum saved,
you’re also saving eight metric tons of bauxite ore from being mined from the
ground. Recycling one ton of steel
requires just a quarter of the energy of mining it new, cuts the associated air
pollution by 86 percent, and saves around 3.6 barrels of oil. Recycled glass requires 30 percent less
energy to produce, paper 40 percent less, copper 85 percent. By recycling most materials, we’re not only
reducing the greenhouse gases required in production, but the environmental
damage caused by extraction: the logging, mining, processing, and
transportation required in replacing the item with new. Recycling creates less water and air
pollution.”
“It is also better for the
economy. Globally, the recycling
industry employs millions of people; the market for scrap metal alone is worth
more than $280 billion. Studies have shown
that recycling schemes create 70 jobs for every one that would be created by
landfill or incinerators. And the scale
is enormous: 630 million metric tons of steel scrap is recycled globally every
year. It’s estimated that 99 percent of
the metal in scrapped cars, for example, ends up reused. Of all the copper ever mined, 80 percent is
still in circulation. In the UK, three
quarters of glass waste is recycled into new bottles, fiberglass, or other
materials.”
The situation with plastic is quite different both economically
and environmentally. Plastics are so
useful that production is huge and growing.
“More than 480 billion plastic
bottles are sold worldwide every year—approximately 20.000 every second…And
that’s just one household item. (It’s
not even the most numerous. That dubious
honor goes to the four trillion plastic cigarette filters flicked to the ground
and stamped out annually.”
Plastics are made from the residuals left from refining
fossil fuels. Consequently, they are readily available and cheap to
produce. They were long marketed as
having the advantage of being throwaway items.
However, they have severe health and environmental issues that are just
now being recognized and studied.
“When plastics are broken down,
by ultraviolet radiation, by the elements, or by force, they do not
disintegrate so much as divide, their chain-like structures splitting into
smaller and smaller pieces of themselves.
Macroplastics become microplastics become nanoplastics. By then they are small enough to enter our
blood streams, our brains, the placentas of unborn children. The impacts of these materials on our bodies
are only just beginning to be understood; none are likely to be good.
Every time we drink from a plastic bottle, we are
ingesting plastic particles. Every time
an infant is provided formula in a plastic bottle and sucks on a plastic nipple,
it ingests plastic particles. Every time
we drive our cars, we cover the land and fill the air with plastic particles
from the tires. Every time we wash our
plastic clothes, we emit enormous numbers of plastic fibers into our water
systems. There are so many plastic
particles in our waterways that enjoying a sea breeze means you are inhaling
plastic particles given off by the ocean water.
Plastics have the curious tendency to attract other
pollutants found in whatever medium they exist, including dangerous compounds
and even pathogens. Although drinking
from a plastic container will send particles into your digestive system, they will
get broken down into smaller particles in the process. With each fracture, exposure to the chemicals
in the plastic increases. If the fractured
particle is small enough it can enter into the blood stream. These things
should be of concern, but they haven’t been until now.
“More than 10,000 additives can
be used to make plastic, of which around 2,400 are potentially hazardous,
according to EU safety standards, including plasticizers, flame retardants,
dyes, lubricants, antistatic compounds, deodorizers and foaming agents. The exact recipe depends on the base plastic
being used and the purpose of the end product.
The plastics industry is notoriously secretive about these additives; a
recent study found that more than 2,000 known plastic additives have been ‘hardly
studied’ for their impacts on human health and are under-regulated in many
parts of the world.”
Polyethylene terephthalate (PET) is a commonly used
plastic in making plastic bottles, for example.
“In 2021, scientists at Brunel
University found that recycled PET leached 150 different chemicals into drinks—including
toxicants such as antimony, BPA, and numerous endocrine-disrupting chemicals
(EDCs) such as phthalates—at a greater rate than virgin PET. Like all PET bottles, they also shed
microplastics.”
Endocrine disrupting chemicals are particularly dangerous
because they resemble the hormones used by humans and other animals. Thus, they can trick the body into responding
to them when it shouldn’t, or generate a totally foreign response. We cannot perform experiments on humans, but
we can study the effects of exposure to such chemicals on other animals. The results are frightening.
“The health impacts of this are,
as yet, unclear. However, human and
animal studies have shown compelling links between phthalates, a common class
of plasticizers, and lower fertility, developmental issues, obesity, and cancer.”
Recycled plastic is not the same as virgin plastic. It can be used, but it accumulates more impurities
and damage every cycle. Thus, it can be
used only a few times and only along with a component of virgin material. Unlike metals and paper products, there is no
economic advantage to recycling plastics—they are always more expensive than virgin
material. The plastic industries were
forced to take up the promotion of recycling by the force of public
opinion. Franklin-Wallis describes
campaigns that were shams aimed mainly at avoiding any sort of regulation of
their practices.
“Over the years a kind of
playbook emerged: plastics companies would make big promises about moving to
more recycled content and even open new recycling facilities, only to abandon
them when attention moved on.”
“In the early 1990s, Coca-Cola announced
a goal to make its bottles from 25 percent recycled plastic, only to abandon
the target four years later once consumer and political pressure had
lifted. In 2007, the company made
headlines again when it set out to ‘recycle or reuse 100% of its plastic bottles
in the U.S.’ and to achieve this, opened the ‘world’s largest PET recycling
plant’ in Spartanburg, South Carolina.
In reality, the company missed its recycling target and quietly shut
down the plant two years later. Coke’s
target of using 10 percent recycled plastic in its bottles by 2010? Missed.
It set a target of 25 percent recycled content in its bottles by 2015
and failed to meet even half that.
They’re not alone. PepsiCo and
Nestlรฉ, among others, have all previously failed to reach
plastics recycling targets. This is
partly a failure of journalism: pledges get news coverage. Few ever check later to see if they come
true.”
Almost without realizing it, the world and the animals
living on it have been inundated with plastic particulates and the chemicals of
which they are comprised. This cannot be
healthy. It could be an existential
threat. Evidence of health threats is
not yet convincing, but the annual production of plastics will continue and
accelerate. Yearly production is
expected to quadruple by 2050. Recycling
is not the answer. The only apparent
solution is to stop making plastics, but we have become so dependent upon them
that this can not happen anytime soon. We
seem destined to follow this path until it is too late to respond, much like
our experience with climate change. Sigh….