Answer:
Industry data show that 59% of HFC 134a ever produced has already been release into the atmosphere (along with 80% of the main HCFC in the market, HCFC 22). According to recent investigations, about 60% of HFC<u> emissions arise from routine leaks from refrigeration and air conditioning.</u>
Explanation:
Brainliest plzzzzzzzzzzz
False, most of the nutrients are absorbed in our stomach. The intestines are mainly for waste.
C.
The soil in the delta is less fertile, causing fewer plants to grow.
The flooding of the Nile caused silt and nutrients to replenished in the soil every year.
An air-purifying respirator that employs a blower to pump air through filters or cartridges and into the user's breathing zone is known as a powered air-purifying respirator, or PAPR. In comparison to a powered or negative-pressure half mask, this generates a positive pressure inside the facepiece or hood, increasing protection.
<h3>What kind of respirator offers a separate source of clean air?</h3>
For entry into or exit from settings regarded as IDLH, Self-Contained Breathing Apparatus (SCBAs) are employed. They can be either open circuit or closed circuit and contain their own breathing air supply.
<h3>What 2 categories of respirators exist?</h3>
Air-purifying and supplied-air respirators are the two main categories of respirators. Respirators that purify the air remove airborne pollutants such particles, dangerous vapors, and/or gases. They are suitable for use in surroundings with low levels of pollution and in areas with enough oxygen.
<h3>When should you use an air purifying respirator?</h3>
a small, unproven area. a lack of oxygen in the atmosphere. Firefighting. Contaminants with a lower explosive limit (LEL—the concentration at which a gas or vapour could ignite) of at least 20%
learn more about air-purifying respirator here
brainly.com/question/3627134
#SPJ4
