How to be a global citizen

"How to be a global citizn?"This is what we've discussed today in class.
In that time, i just thought of several approaches as follows:

1.pay more attention to the global issue , no matter political or entertainments.

2.care about the people who is suffering from the war ,the starvation ,and the proverty.

3.care about the earth,the only one planet that we can live on.Though we can't reverse the
situation greatly,but once every human beings take some actions , making the enviroment
better will not be a dream anymore.

4.devote my professional to the world oneday in the future.

In my opinion, being a global citizen should take the responsibility of the world ,in other words,
instead of being selfish(thinking everything according to the profit),we should give our love to the every parts of our world