The phrase "amount of harmful" is not correct in written English.
It is typically used when discussing the quantity or degree of something that is harmful, but it needs to be rephrased for clarity.
Example: "The amount of harmful substances in the water exceeds safe levels."
Alternatives: "level of harmful" or "quantity of harmful".
At the same time the amount of harmful emissions and wastes increase.
Hot liquids dramatically increase the amount of harmful chemicals released by plastic bottles, according to a study.
Without the water, the fuel rods could spontaneously ignite, releasing as much as five times the amount of harmful radioactivity contained in the reactor's core.
Now scientists in Aberdeen are embarking on research into how best to cut the amount of harmful gas emitted by Britain's ruminants each year.
Knocking out this protein, called proprotein convertase subtilisin kexin 9, dramatically reduces the amount of harmful LDL cholesterol circulating in the bloodstream.
Diet and exercise are the first and best places to start if you need to lower the amount of harmful low-density lipoprotein (LDL) in your bloodstream.
However, HFO generates large amounts of harmful exhaust emissions during combustion in a marine diesel engine.
The judge wanted to know by late March how Volkswagen was going to fix cars so they would not continue spewing illegal amounts of harmful nitrogen oxides.
Oil storage tank zones possessing large amounts of harmful substances and energy with great probability of accidental release, can pose risks to personnel, equipment facilities and environment.
Last month, Bullog, a popular bastion for freewheeling bloggers, was shut down for what the authorities said were its "large amounts of harmful information on current events," according to a notice posted by the site's founder, Luo Yonghao.
Adsorption is one of the most effective methods for the treatment of wastewater containing dyes owing to its low operating cost, simplicity of process design and smaller amounts of harmful substances.
