Science continually changes our world. It changes the way we travel and the medicine we take, and also helps improve the condition of the environment. However, science is also responsible for the weapons of war and the pollution of nature.Science had made us invent new things making as easy to do all the work but few science inventions have also been a risk to our health.For example, take the vehicles they have a very good use because they helps us to move to far away places in time and even doesn't make as tired. But because of them only nowadays the pollution level have gone up and many diseases are spreading all over the world. If science keeps on developing like this we may progress a lot and it would even make our lives easy but one thing should also be kept in mind that science should only invent some things which doesn't effect our health and environment.