1. Luca knew it was an earthquake because the ground started shaking violently
2. One of the main cause of earthquakes is the process of drilling into the earth to find gas.
3. In 1950-51, in Austria, there was about 650 avalanches that killed thousands of people and destroyed many buildings.
4. The main causes of avalanches is the climate changing, the more it changes,the more the temperature rises, the more avalanches will happen.
5. When Hurricane Katrina struck New Orleans, the dam broke and all the water caused a flooding.
6. Claire is worried about the future because, might New Orleans recover from all the damage?
