I want to write some news about things which I think are important but I don't know how to write them (so that they are accepted) and where to publish them. Any advice?
It's tough to give advice based on what you just said. Do you at least know the subject you plan on writing about?
If you are passionate, you can always create your own blog, and have it pinged so that it will appear on major blog aggregators like Technorati. Rich
Write up your first piece, and get others to critique. Do this seveal times. Once you get the hang of it, and your critics like them, you are on your way.