How many pounds of cigarette butts are littered worldwide every year?

1 answer:

6 0

Each year, an estimated 1.69 billion pounds of butts wind up every year. Cigarette butts are by far the most littered item in the world. They also present a potential serious hazard to nature. The butt itself is composed of two parts which are the plastic filter and the remnants of the used tobacco. The leftover tobacco may be biodegradable but the filters are made from a plastic material known as cellulose acetate-- a chemical compound that breaks down but never disappears.

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Which of the following factors should be considered when designing a personal fitness program?

dezoksy [38]

<span>Letter D. All of the above. The three given factors should be considered when designing a personal fitness program. In planning a personal fitness program, one must consider the goals they are aiming to complete, they must also consider the activities suited to for their goals, and lastly they must consider a variety of exercises for their personal fitness program.</span>

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nlexa [21]

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Functions of the skeleton

madreJ [45]

There's six main functions of the skeletal system

1 - Support
Provides structural support for the entire body.

2 - Protection
Surrounds soft tissue- ex. ribs and sternum protect the heart and lungs, - skull protects the brain.

3 - Movement
Skeletal muscle is attached to bone so it pulls on the bone when it contracts.

4 - Mineral homeostasis
Stores calcium and phosphorus--minerals are released into the blood when needed.

5 - Blood cell production
Red bone marrow produces red blood cells, white blood cells and other blood elements.

6 - Storage
Storage of minerals and lipids(fats)---yellow marrow stores fat --(found in long bones).

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3 years ago

Write the term that completes the sentence.

sweet-ann [11.9K]

Homeostasis

Explanation:

The ability of an organism to maintain its internal stability against external environmental changes thereby developing the constant internal environment within the organism is known as Homeostasis.
Homeostasis is deeply produced in warm-blooded animals to control body temperature, fluid balance, blood pH, and oxygen pressure, concentration of chemicals,etc.
During homeostasis process entire body system work together to maintain the balance. If not controlled or if disrupted the process will result in disease or disorder.

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3 years ago

Over the past 20 years, the major pollutants in our world have __________.

irga5000 [103]

The choices for this question can be found elsewhere and as follows:

a. decreased significantly
b. increased significantly
c. stayed at the same levels
d. decreased slightly

I believe the correct answer from the choices listed above is option B. <span>Over the past 20 years, the major pollutants in our world have increased significantly. It is very evident when you look at the environmental statistics.</span>

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3 years ago