can u give me suggestions abt my speech plz
Good afternoon everyone! I’m very appreciated that I can stand here and give you a short speech.today my topic is “I can”

Nowaday,Global warming is a growing problem in the world
it is important to cure the world, for the sake of ourselves and our descendants.
. Kennedy，John Fitzgerald once saidAsk not what your country can do for you,Ask what you can do for your country!
Maybe I cant change the world
Bt I can change myself
Mayb I can't change the past,
bt I can try my best to do everything nowaday
So what can I do?
Firstly I can Appeal to the people to protect enviroment!
Secondly I can raise people of awakening strengthen environmental protection consciousness with understanding
Thirdly I can Reduce Garbage and Use Recycled Paper and non-woven bag
and Ive wrote the blog abt enviroment protection at www.chared.myblog.com
I can promote knowledge about environmental protection
I believe myself and
Ibelieve in our future
I can do it!

Question

can u give me  suggestions abt my speech plz
Good afternoon everyone! I’m very appreciated  that I can stand here and give you a short speech.today my topic is “I can”

Nowaday,Global warming is a growing problem in the world
it is important to cure the world, for the sake of ourselves and our descendants. 
. Kennedy，John Fitzgerald once saidAsk not what your country can do for you,Ask what you can do for your country!
Maybe I cant change the world 
Bt I can change myself
Mayb I  can't change the past, 
bt I can try my best to do everything nowaday
So what can I do?
Firstly I can Appeal to the people to protect enviroment!
Secondly I can raise people of awakening strengthen environmental protection consciousness with understanding
Thirdly I can Reduce Garbage and Use Recycled Paper and non-woven bag 
and Ive wrote the blog abt enviroment protection at www.chared.myblog.com
I can promote knowledge about environmental protection
I believe myself and
Ibelieve in our future
I can do it!

Answer

That's very good!  A few things:  
1. We actually say "nowadays" not just "nowaday."
2. You should say "John F. Kennedy" as that is how we refer to him in speech (or you can even say J.F.K.)
3. "I can raise people of awakening strengthen environmental protection consciousness with understanding" this does not make sense.  Maybe you want to say, "I can raise awareness in other people about environmental protection"? I'm not sure exactly what you want to say with this sentence.

Otherwise, I thought this was very good!

Answer

Pretty good and inspirational.
Just a few things, in addition to what Phillip already stated;
1. "it is important to cure the world, for the sake of ourselves and our descendants."
      - "It is important to heal the world, for the sake of ourselves and our future generations."
          I think it sounds better if you change "descendants" to "future generations"

Answer

perfect~~ your topic is very innovative.
i think it's better to change the last sentence to "we can do it".do u think so ?