-Can you think of any other inventions that their creators might regret? (E.g. dynamite, sun beds, plastic shopping bags) Suggest why they might regret them.
I think all disposable products such as plastic and paper bags and cups etc. are inventions that their creators might regret. I know they are convenient to use and I've also used them for a long time for its convenience. However, using disposable products is one of the biggest cause of polluting the environment since we throw away them after using them only once. It takes a really long time until they get decomposed. Most of them are buried in the ground, it causes soil pollution. Therefore, people should reduce use of disposable products.
-What are the greatest inventions of all time? How have they helped people? Have they also been used in any bad ways?
I believe a smartphone is the greatest invention. A smartphone has offered people more convenient life. For example, through a smartphone they are able to watch videos, send e-mails without computers and even work on their documents. Also they can find out bus and subway schedule and by down loading apps so they don't need to wait for a bus or subways.
However, on the other hand, nowadays many people are addicted to using a smartphone. Especially, children and teenagers spend a lot of time on using it every day. It will interrupt them socializing with their friends and family. In addition, it will cause sleep disorder and memory problem.
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