Please review my conclusion.
In conclusion, I agree with those who support space research, because it has so many benefits as I already stated. Exploring the space may allow mankind to discover more and more in numerous fields and invent practical benefits on Earth.
Thanks in advance.
In conclusion, I support space research, because it has so many benefits as I already stated [People will know you already stated the benefits if they read your essay.]. Exploring the space may allow mankind to discover more and more in numerous fields and invent practical benefits on Earth.
The underlined phrases are a little vague? What other fields are you referring to, and what benefits?
You can use humanity, people, or us – but not “mankind.” From the fact that you wrote “the space” and “mankind,” I’m guessing you’re not a native speaker of English. It’s been considered inappropriate to use “mankind” as a universal in American English for at least 30 years 