PERSONAL LETTER


•Personal Letter

Jan 11,2020
* Frida <Frida_cahya03@gmail.com>                                                                                 
To : Nanda.aurelia05@gmail.com
Dear Frida,

How are you doing Frida? Hope you are doing fine. I want to tell you about my school. Every month at my school, a clean Friday is held, which is held on Friday after a break. Every student and teacher all clean the room in the school. Required division of places to clean, 8 students in the class and will be assigned to the place that has been determined by the teacher. Like cleaning the basket field, hall, mosque, fish pond, and others. Everyone worked together, no one did not work all participated in the activity. After cleaning, everyone returns to class for a break. Maybe that's all I can tell you.


CAUSE AND EFFECT

Greenhouse Effect

  Making a visit to the highlands, it might be very easy to find a greenhouse that is a building whose sides are made of glass, both the roof, walls and doors. The greenhouse effect at a reasonable level is important and necessary. What causes damage and global warming is too much gas produced by the Greenhouse Effect.
   The increase in greenhouse effect gases is caused by burning fossil fuels such as fuel oil, coal, and other organic fuels. As the greenhouse effect gases increase in the Earth's atmosphere, more solar heat is trapped. This causes the temperature of the Earth to heat up. The heating up of the Earth's surface temperature causes climate change. Forests and ecosystems become disturbed. Forests and ecosystems that have the function of absorbing carbon dioxide become less capable. The effects of the greenhouse effect and global warming include melting of icebergs, rising sea levels, and sinking of several islands.


EXPLANATION TEXT

Landslide

  Landslide are geological events that arise due to the movement of rock or soil masses with various types and types such as the collapse of large lumps of soil or falling rocks. Landslides generally occur in hilly or mountainous areas. There are many regions in Indonesia that have mountain and mountain geography that are vulnerable to landslides.
  The cause of landslides is as a result of sudden or gradual changes in composition, structure, hydrology and vegetation on hillsides, these changes can be natural or caused by human behavior. Factors that influence these changes are deforestation, river erosion, earthquakes, heavy rain, explosions in mining areas, vibration by machines in the traffic lane. The process of the first landslide is the absorption of rainwater into the ground so that it affects the load in the soil so that it will be at its maximum limit in containing water. Then the change in the texture of the soil, when the water reaches the impermeable part of the soil, the soil will become slippery, so that there is a very rapid movement of the soil. The surface of the soil eventually undergoes weathering, as does the structure of the soil layers beneath it to the ground. This is what causes the soil to move then out of the slope and there is a landslide.
  Landslide usually occur in hilly or mountainous areas. Landslides can cause massive casualties or loss of life or in a very short time. The cause of landslides is as a result of sudden or gradual changes in composition, structure, hydrology, and vegetation on hillsides. Therefore, to reduce the occurrence of landslides done by way of reforestation, surveying and mapping lands that are vulnerable to landslides and others.

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