Why have trans fats been banned from some restaurants? how are they created?

Trans fats have been banned from some restaurants because they increase the risk of developing heart disease.

Explanation:

Naturally-occurring trans fats are produced in the gut of animals and they can be found in dairy products and meet. However, there are not sufficient studies to determine whether they have bad effects on health or not.

Artificial trans fats, also known as partially hydrogenated oil, are created in an industrial process which adds hydrogen to liquid vegetable oils to make them more solid.  Trans fat raise the bad cholesterol levels (LDL) and lower the good cholesterol levels (HDL). So they increase the risk of developing heart disease, stroke and also diabetes type 2.

The artificial form of trans fat is found in a variety of products, for example:

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the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.