This produced strange by-products in the humans so infected.

Typical saprotrophic fungi utilized carbohydrates in the medium producing acidic by-products and no red color change.

Industrial manufacturing processes for plastic and other essential items often produce nasty by-products which can pose hazards to human health and the environment.

It is also expected to produce by-products for fertilizer production, and olefins and plastics manufacturing.

Incineration does not produce usable by-products, although the energy can be used to generate electricity.

In addition, side reactions may produce by-products.

In an intense electrical field these gases can produce reactive by-products, and in closed rooms these can reach a hazardous level.

However, there is a growing body of evidence that these machines can produce undesirable by-products.

Many technological processes produce unwanted by-products, known as pollution, and deplete natural resources, to the detriment of the Earth and its environment.

This was a concern in aircraft and tanks as carbon tetrachloride produced highly toxic by-products when discharged onto a fire.