Conclusion

 Doing this project, I've felt many things which astonished me a lot. As I mentioned on Introduction, we would have extremely serious problems and could become extinct as dinosaurs had disappeared if the ozone layer were totally destroyed. The issue, holes in the ozone layer that might cause the end of the Earth, has to be considered as the most dangerous problem and being very important in the world so that we can try to reduce something harmful to it. Now that many people have been educated all over the world, they know about the ozone layer and the holes in it. Few people, however, are just conscious of the issue, fewer people are doing something individually to protect the ozone layer, and the fewest people are doing it appropriately. Generally, although the issue is known as one of the most serious problems which all countries have to discuss about to solve, no one knows specifically what to do and how to do to help it. In my personal view, all governments should try to invent or find out some replacements of harmful materials we now use as soon as possible, impose high taxes on harmful goods and vice versa reduce taxes on harmless goods at their level. And they also should educate people about the issue and ways to protect the ozone layer individually. Mankind has been living on the Earth only for 4 million years and the Earth has existed for 4.5 billion years but now we are destroying the great nature and ourselves. In this way, there wouldn't be any space to breathe in the future. Do we use just useful materials but harmful because we will die before the end of the Earth? Humans in the future will have been living on the Earth as well and they are our descendants and our children! We have to concern the issue and do our best to leave our beautiful natuer so that our descendants can see it. The earliest time is when you think it is late.