Select each correct answer. More than one answer may be correct.

All plants need nitrogen to survive, but it is naturally available to them in only limited supplies. In 1909, engineers developed a process to make nitrogen available to plants by synthetically producing the chemical ammonia. Once produced, ammonia could be used as a fertilizer for crops around the world thanks to its nitrogen content.

The process that the engineers developed is still used today. It makes use of the reaction between nitrogen gas and hydrogen gas at very high pressures. Nitrogen gas is the most abundant gas in the atmosphere and is widely available. Hydrogen gas needs to be made from the methane found in natural gas. Natural gas is a fossil fuel that can be extracted from underground reserves.

What natural resources are used to make ammonia fertilizers?
natural gas
atmospheric nitrogen
ammonia
hydrogen gas

1 answer

The natural resources used to make ammonia fertilizers are:

  • Natural gas (used to produce hydrogen gas)
  • Atmospheric nitrogen (used in the synthesis of ammonia)

Ammonia itself is not a natural resource; it is the product formed from the reaction. Hydrogen gas is not a natural resource in itself; it is produced from natural gas. Therefore, the correct answers are natural gas and atmospheric nitrogen.