Factory Farming: Cutting Lives Short for Humans and Animals

The Hidden Costs of Factory Farming

Factory farming has become a significant concern not only for animal welfare but also for its impact on human health and the environment. A recent report titled the Factory Farming Index (FFI), released by World Animal Protection, highlights the far-reaching consequences of this industrialized food system. According to the report, factory farming leads to a loss of 1.8 years of healthy life per person globally.

Tricia Croasdell, CEO of World Animal Protection, emphasized that this is the first attempt to quantify the widespread harm caused by factory farming. "Very little research currently exists on the multiple effects of the immense global factory farming industry," she stated.

Key Drivers of Health Loss

One of the main factors contributing to this loss is antibiotic resistance. Factory farms use an alarming amount of antibiotics—66,000 tonnes annually, which is double the amount used in human medicine. This excessive use is primarily to prevent disease in crowded and unsanitary conditions. Healthy animals are often treated with antibiotics to compensate for stress and the high risk of disease associated with intensive farming practices.

Another major contributor is pulmonary disease. Large volumes of animal waste release ammonia, nitrous oxide, and fine particulate matter, which are linked to respiratory illnesses, especially among people living or working near these facilities.

Excess meat consumption is another factor. High intake of red and processed meat is associated with various health issues, including colorectal cancer, heart disease, type 2 diabetes, stroke, kidney disease, and potentially dementia.

Even individuals who do not consume factory-farmed animal products are affected, as the system contributes to antibiotic resistance and air pollution, indirectly reducing human lifespan.

Environmental Impact

Factory farming also has a massive environmental impact. It is a major contributor to greenhouse gas emissions, accounting for roughly 29.7 percent of the global agrifood system’s total emissions. It is responsible for around 25 percent of human-caused water pollution, largely from excess nitrogen and phosphorus.

Additionally, the industry consumes 14 percent of all human freshwater withdrawals, approximately 530 trillion litres annually. It also occupies cropland the size of India (350 million hectares), mostly to grow animal feed.

Animal Suffering and Lifespan

Beyond human health and environmental costs, factory farming causes immense animal suffering and drastically shortened lifespans. Globally, farmed chickens live only five percent of their potential lifespan, and pigs just four percent. In the United States, this drops to 1.3 percent (as little as 35 days) for chickens and three percent (160 days) for pigs. Cows live longer, particularly in dairy production, but welfare remains compromised.

A Call for Change

The report emphasizes that improving animal welfare alone is insufficient. The only lasting solution is a shift away from factory farming toward a humane, equitable, and sustainable food system. This involves increasing plant-based foods in diets, supporting small-scale producers who prioritize care for animals and land, and ensuring any remaining animal farming meets the highest standards for welfare, environmental protection, and human health.

"We need to support countries in looking to the future of how they feed their populations without damaging human health, animals, and our planet," she concluded.

Dr. Victor Yamo, Executive Director of the Global One Health Advocacy Alliance, describes the crisis of factory farming as a quintessential “One Health” problem, where the health of humans, animals, and ecosystems are interconnected. Poor animal welfare leads to disease, which threatens humans while environmental degradation worsens both human and animal health.

"Reducing intensive farming and improving animal welfare lowers the risk of zoonotic spillovers," he said.

Global Production and Consumption Trends

In 2020, the production of factory-farmed animals reached 76 billion worldwide, with 46 percent of chickens, pigs, and cows farmed in just four countries: China, Brazil, the USA, and Indonesia. The highest consuming countries, on average per person, include Israel, Panama, Belarus, and Qatar. These countries have an estimated ten animals consumed per person annually.