The skeleton comprises of many hard and soft tissues. Hard tissues are the various kinds of bones that are present in the body. Soft tissues are the cartilages, marrow and the tendons that connect the various bones. Bones are the structures of the skeleton that provide a framework to protect the organs and give strength to the body. The cranium bone that is present in our head protects the brain and gives a rigid shape to our head. This rigid shape also makes it possible to hold the eyes, ears and nose in the right places.
<u>Question</u>:
Which activity produces the smallest amount of greenhouse gases?
a. driving a car
b. riding a bicycle
c. cooking with gas
d. operating a generator
<u>Answer</u>:
Riding a bicycle produces the smallest amount of greenhouse gases
<u>Explanation</u>:
Cars and other heavy vehicles account for approximately 1/5th of the United States emissions, producing carbon dioxide and other greenhouse gases such as methane and nitrous oxide. Cooking gas too produces a lot of carbon dioxide. Natural gas too basically consists methane in an odourless form and therefore when released produces greenhouse effects and in turn causes detrimental effects on the environment.
The generators that are used both at low scale and also in high level industries is known to produce toxic levels of carbon monoxide and methane. Compared to all these, a bicycle which produces greenhouse gases during its production does not release as much greenhouse gases and the rest.
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