a)Luca knew it was an earthquake because his bed started shaking.
b)one of the causes of earthquake might be 'fracking',the proces of drilling down into the earth to find gas.
c)In 1950-51 in Austria, over a period of three monts, there were about 650 avalanches that killed more that 265 people and damaged thousands of buildings.
d)The main causes of avalanches are the vibration and increases of temperature, heavy snowfalls and loud noises.
e)When Hurricane Katrina struck New Orleans nearly 2,000 people were killed and thousands lost their homes.
f)Claire is worried about the future because this kind of natural disasters happen more and more and if they aren't stoped more people will have be hurt or even die.
