The following ‘inventions’ provide seven good reasons why society needs to use the precautionary principle. Invention throughout human history has been a process of trial and error. When an error was made it impacted very few people because errors were confined to a particular locale. As economies became national and then global ‘errors’ could spread around the world.

The following inventions were developed and exploited for economic reasons without regard to potential environmental impacts. In some cases the impacts were actually known beforehand and yet the invention was still marketed and used.

Short-term economic gains from new technologies should never be pursued when there is potential detriment to human and environmental well-being.

Hydrogenated Oils

The health scourge of the 2000s, Hydrogenated Oils, also known as ‘trans fats’, were invented for a practical purpose. In the late 1800s, people began adding hydrogen to vegetable oils to increase the shelf life of foods. When margarine, a ‘trans fat’ was first marketed it was called a healthy choice as an alternative to butter. As it turns out modern studies found that hydrogenated oils, which do not occur naturally, had unforeseen health consequences, contributing to a rise in bad cholesterol and increasing the risk of heart disease.

DDT

DDT was supposed to be the magic bullet against the scourge of insect-borne diseases like malaria. Discovered in 1873, DDT wasn’t used widely until 1939, when Swiss chemist Paul Hermann Muller noted its effectiveness as a pesticide during World War II, a discovery that earned him a Nobel Prize in 1948. After the war, the use of DDT from 1942 to 1972, some 1.35 billion pounds of DDT were used in the U.S.

Rachel Carson’s book Silent Spring published in 1962 was the first to call attention to the nasty little fact that DDT produced fertility and neurological problems in humans and accumulated up the food chain in wildlife, poisoning birds. Use of the chemical was ultimately banned, but it took many years.

Asbestos

Asbestos appeared to be a wonder material. It is a versatile mineral fibre that is good at absorption and can withstand heat. However, those same strong and useful fibres are really rather nasty. Inhaling the toxic particles in asbestos causes asbestosis — a condition instigated by fibrosis in the lungs, sparking chest pain, shortness of breath, nail abnormalities, clubbing of fingers and other complications.

Leaded petrol

We now have unleaded petrol. For six decades, petrol companies sold leaded petrol, ignoring the known dangers associated with lead so they could get rich. Tetraethyl lead boosted the octane levels in petrol but there was speculation surrounding the safety of that decision from the beginning. In the Nov. 10, 1924, issue of TIME, a report showed that 35 men at the Standard Oil Company of New Jersey had come down with an “occupational disease.” Symptoms ranged from insomnia to low blood pressure, all due to lead poisoning.

CFCs

Chlorofluorocarbons, or CFCs, wreak havoc on the atmosphere. Used in refrigeration units and aerosol cans, CFCs combine with atmospheric ozone, neutralising the molecular compound and reducing the ozone layer, an important barrier that protects the earth’s surface from ultraviolet radiation from the sun. While increased regulation since the 1970s has diminished their use, CFCs can endure in the atmosphere for nearly a century, making this a very long-lived mistake.

Agent Orange

A potent herbicide used from 1961 to 1971 in the Vietnam War, Agent Orange was used to decimate Vietnam’s thick canopy of foliage. While it succeeded, the price was high: exposure proved deadly to humans, causing cancers, birth defects and a slew of other disorders. Over 80 million litres of it were dumped on Vietnam, resulting in hundreds of thousands of injuries and birth defects to Vietnamese citizens. U.S. veterans faced exposure too.

Polystyrene foam

Created by the Dow Chemical Company in 1941, styrofoam (polystyrene foam), is light, buoyant and a very good insulator. Cups, plates, packaging, insulation and a multitude of other uses do not outweigh the fact that styrene, one of 57 chemicals released during the creation of styrofoam has been deemed by the EPA as a possible carcinogen. Discarded polystyrene does not biodegrade for hundreds, possibly thousands, of years.

Polystyrene foam is a major component of debris in the ocean, where it becomes hazardous to marine life and could lead to the transfer of toxic chemicals to the food chain. It can be lethal to any animal that swallows significant quantities.