Cotton is everywhere. It’s in our clothing, our furniture, our bedding, our food (cottonseed oil/cellulose), and even our money! However, cotton has a dark side – it’s massively resource intensive and an environmentally destructive crop. The exact impacts vary among countries, growing practices, and conventional vs organic cotton.
The problems with cotton in general are very simple:
- It uses tons of pesticidesˆ, fertilizers, and other toxic chemicals.
- It’s immensely water intensive to grow and process into final products.
- Plus, heavy use of chemicals leads to lots of water contamination.
- As an industrial monocropˆ it degrades the soil, reduces biodiversity, and replaces wildlife habitats.
Pesticides and toxic chemicals:
Cotton is a chemically intensive crop all along its supply chain from the field to the store shelf. These include pesticides, herbicides, insecticides, fertilizers, defoliants, dyes, and other toxic chemicals used in manufacturing.
Pesticides, insecticides, and herbicides are used heavily to protect cotton from pests like the bollworm, and weeds. Additionally, monocropping leads to an increased need for pesticides because it disrupts normal and healthy ecosystem function. Crop rotation and co-planting are farming methods designed to preserve ecosystem health; isolating large acres of a single crop leads to greater problems with pests and soil degradation. Pesticides and related chemicals are harmful to human health and our ecosystems. These chemicals contaminate the broader environment through runoff and by seeping into soil, sometimes reaching deep aquifers.
Defoliants are chemicals used to help leaves fall off plants; for cotton, this makes it easier to pick. Agent Orange is a well-known chemical defoliant, which gained recognition during the Vietnam War due to its prolific use by the US military and the subsequent injury to humans and damage to ecosystems.
Cotton also requires high amounts of fertilizers, primarily nitrogen-based synthetic ones. These fertilizers contribute significantly to emissions of nitrous oxide (N2O)ˆ, which is a powerful greenhouse gas.
Dying cotton is the most chemically intensive step in the processing of cotton into final products like clothing. Conventional cotton products use extremely toxic dyes, plus bleaching agents, wetting agents, industrial detergents, softeners, and salts. Consequently, textile manufacturing produces large quantities of wastewater that contaminates surrounding rivers and lakes with all of those toxic chemicals.
To make one T-shirt uses an amount of water equal to what a person drinks over the course of 2.5 years. Cotton irrigation systems are an inefficient use of water, as is the case with all industrial agriculture. Diverting water from nearby lakes and streams to irrigate crops results in lost water during transport and reduces the availability of fresh drinking water.
The case of the Aral Sea disaster is one of the best examples of cotton’s environmental impact. Once the fourth largest freshwater lake, the Aral Sea was drained to near extinction to irrigate cotton crops. During the 1950s, it supported a booming fishing industry, providing livelihood and employment for thousands of people. It was considered an oasis in central Asia, located between Kazakhstan and Uzbekistan. Now, it is an arid desert where communities struggle.
Soil erosion and destruction of habitat:
Cotton is a monocrop and it takes up vast quantities of space. Reduced fallow time between growing has led to soil degradation, increasing the need for fertilizers. After almost a century of heavy use, many established cotton fields are thoroughly exhausted, forcing expansion of agricultural land into surrounding habitat. This destroys vital habitat for wildlife.
ˆ Denotes a term that is defined/explained under the terms/concepts/glossary page of blog. Symbol found following the word the first time it’s used in a post.