Question 12: describe a general rule for determining your latitude from looking at star trails.

1 answer:

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<span>Polaris is almost directly above the North pole. So when you stand on the north pole and look directly up, you will see Polaris. And at the equator looking North, you will see Polaris on the horizon. The angle Polaris is above the horizon is equal to the latitude that you are standing on.</span>

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Reason why Greenhouse effect and Ozone layer Depletion are considered two related serious environmental concerns of the 21st cen

Marat540 [252]

Both the greenhouse effect and the ozone layer depletion are caused entirely or partially because of the human activity, and they both have similar effect.

Explanation:

The greenhouse effect is a process that is caused by the so called greenhouse gasses. Those gasses are able to trap heat into the atmosphere, thus cause global rise of the temperatures. While this process is mostly caused by natural processes, the human influence has constantly been increasing.

Greenhouse gasses are:

carbon dioxide
methane
nitrous oxide
fluorinated gasses

The ozone layer is a layer that serves as a natural protector from the UV radiation. Because of the usage of several chemicals by the humans, the ozone layer has been depleted. This can cause enormous damage as increased UV radiation can be fatal for any living organism on Earth.

Ozone depleting substances: