Discussion

The Advantages and the Disadvantages of Nuclear Energy

Nuclear energy is commonly offered as an alternative to overcome the crisis of energy. The debate of whether the use of nuclear energy is an appropriate choice has not come to an end. Some people agree with the utilization of it because of its benefits. Some others, however, disagree because of its risks to the environment.

Those who agree with the operation of nuclear reactors usually argue that nuclear energy is the only feasible choice to answer the ever-increasing energy needs. In their opinion, the other sources of energy: oil, coal, and liquid natural gas are not renewable and safe, while nuclear energy can be sustainable when produced in a safe way.

However, people who disagree with the use of nuclear energy point out that the waste of nuclear products can completely destroy the environment and human lives. A meltdown in a reactor, for example, usually results in the contamination of the surrounding soil and water. Take for example, the blow up of the nuclear reactor at the Chernobyl Nuclear Power Station in Russia twenty years ago. The serious contamination imperiled people and the environment severely.

It is obvious that nuclear energy should be avoided because it really endangers the environment but what about a less polluted energy instead of nuclear energy? Is there any alternative energy to overcome the crisis of energy? 

Source: http://www.text-types.com/2011/05/example-and-generic-structure-of_31.html

Explanation

How do Seasons Happen?

 
Seasons come to us regularly. We have probably noticed that it gets warmer in summer or dry season while it get colder in the winter or wet season. However do we know how these seasons change?

Seasons happen and change every year. This happens because the earth tilts back and forth as it goes around the sun. During the summer, the earth tilts toward the sun. It makes half of the earth hotter. this condition is what we call summer. During the other half of the year, the earth tilts away from the sun. As a result, it makes that half of the earth cooler. This cool condition is then what we call winter.

The different parts of the world have the same season at different times. In the northern half of the world , winter happens during the months of December, January and February. The regions are such North America and Europe. In the other hand, the southern half of the world have winter during the months of June, July and August.The regions are like South America and Australia. How does this difference happen? The same season happens at different times because the top and bottom halves of the earth tilt away from the sun at different times. 






Source: kidscientist.com/5/why-do-seasons-happen