Nova : Asteroid

Hi everyone,
Today, I have a home work to listening lecture on the internet. It's really interesting for me because I can know a bout the Earth, why was dinosaur disappear, and disaster all over the world.
This lecture talking about the asteroid will be hit to the Earth. It's sound so terrible, because every thing will be destroy around the place asteroid hit to the Earth. It's really really huge area. For example: In 2004, the scientists found out a asteroid move in the sky and it seemed to be hit to the earth. The was wide 1000 feet and if it hit to the earth, it would destroyed 80%-90% the life in the earth. Do you know that 65 million years ago, the Earth was hit by a asteroid and made all the dinosaur disappear. The researcher guess that in Friday, 13th April, 2029, the asteroid will be hit to the Earth. But another opinion from NASA improve that is not true, It's will come in 2036 if it's pass to the key hole. I don't know which one is true, but I am still care about this problem. How we can solve this problem??? The scientist said we can not fight with asteroid but we can try our best to control and adjust the speed of asteroid. It's not easy job but we need to do that to prevent asteroid.
In my opinion, If the asteroid happened, It would be a terrible day for us : everything would be destroy, no live in the Earth, everything would stop... But I hope with the developing day by day of science, we can control the asteroid and find out some solution to keep out of the asteroid.

American Housing....

I have read the survey from www.census.gov website. It talked about American Housing Survey.
The AHS conducts a national survey and a metropolitan area survey. Both surveys are conducted during a 3- to 7- month period. What does "AHS" mean??? It means household survey that ask the question about the quality of housing in the United States. They interview visit or telephone the household occupying each housing unit in the sample. For unoccupied units, they obtain information from landlords, rental agents, or neighbors.
The national survey, which gathers information on housing throughout the country, interviews at about 55,000 housing units every 2 years, in odd-numbered years. From 1984, each metropolitan area is represented by a sample of at least 3,200 designated housing units. The units are divided between the central city and the rest of the metropolitan area. They survey the home in the national located. They come from each of the 50 states and the District of Columbia.
Through this survey, you can know how they can survey and understand the life of person, and they can adjustment the life of person. Besides, they can control the standard of living and develop it day by day.