THE ECONOMIC AND ENVIRONMENTAL DAMAGE
About 70% of municipal solid waste ends up in landfills or unregulated sites. In sub-Saharan Africa, for instance, 24% of waste is disposed of in landfills, while the rest is left on open dumps, streets, rivers, and other unsuitable locations.
We live in a society where waste is often disposed of without considering the cost to either the consumer or the producer. Waste decomposing in landfills releases greenhouse gases. The release of carbon dioxide, nitrates and hydrogen sulphides can harm people’s health, either by polluting the air we breathe or contaminating nearby water sources.
My research argues that this poorly disposed of waste also causes economic damage. To determine this economic damage, we compared the ongoing costs of poor waste management in 44 sub-Saharan African countries between now and 2060, with the costs of better waste management practices such as sanitary landfills and anaerobic digestion.
WHAT ARE ANAEROBIC DIGESTION AND SANITARY LANDFILLS?
Anaerobic digestion is a natural process that uses an anaerobic digester (a sealed container) in which microorganisms such as bacteria convert organic waste into biogas.
The most energy-rich component of biogas is methane, which makes up 50% to 75% of its content, depending on the type of waste and operating conditions.
This story is from the Farmer's Weekly 5+12 January edition of Farmer's Weekly.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber ? Sign In
This story is from the Farmer's Weekly 5+12 January edition of Farmer's Weekly.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber? Sign In
Review: the Toyota Hilux 2.8GD-6 DC 4×4 GR-Sport III
The third iteration of the Hilux GR-Sport has finally achieved a sense of presence and style befitting its raceinspired branding. But is this the ultimate modern Hilux? Car Magazine takes a closer look.
Why maize prices soar in Kenya and Malawi but not Tanzania
Namhla Landani, an economist at the Centre for Competition, Regulation and Economic Development, University of Johannesburg, and Arthur Khomotso Mahuma, economist and researcher at the Centre for Competition, Regulation and Economic Development, University of Johannesburg, analyse the issue.
Wet carcass syndrome: a scourge in SA sheep farming
Wet carcass syndrome continues to take a huge financial toll on South African sheep farmers. Octavia Avesca Spandiel spoke to two experts about the ongoing genetic research aimed at addressing this issue.
Pollination innovation
Bee-Tech Group is transforming South African agriculture with pollination technologies that boost crop yields and enhance sustainability. Founder Michiel Bruggeman spoke to Octavia Avesca Spandiel.
The valuable addition that makes this farm tick
Owning the value chain provides farmers with far more control over their produce. However, it requires a fine balance between production and ensuring there is a strong and steady market. Lindi Botha visited Rosemary Hill to find out how this essential oil producer leverages hospitality to make the farm viable.
The benefits of recirculating aquaculture systems
A powerful set of attributes has established recirculating aquaculture systems as a cornerstone of global temperate fish farming, writes Leslie Ter Morshuizen, owner of Aquaculture Solutions.
Minister has big plans for emerging and commercial farmers
DA leader and Minister of Agriculture John Steenhuisen spoke to Glenneis Kriel about his priorities for his department over the next five years, including an increased focus on biosecurity.
New study aims to make wheat more disease resistant
A recent international study explains how bread wheat has helped to transform the ancient world on its path to becoming the iconic crop that today helps sustain a global population of eight billion.
Conservation farming and biodiversity boost soil health and sustainability
A recent academic event focused on research into the links between soil biodiversity, soil health and sustainable agriculture
What has led to the unparalleled rice shortage in Japan?
Japan is facing a rice shortage amid concerns about a potential 'megaquake', several typhoons and an annual week-long holiday, which has led to an increase in panic buying.