WARSAW/LONDON (Reuters) -Poland is working on a deal to import liquefied natural gas (LNG) from the U.S. to supply Ukraine and Slovakia, a pact that would further tighten the European Union’s ties to ...

In order to make your writing clear, you need to use commas. As well as using them to separate out key information, or divide up different clauses, commas can also completely change the meaning of a ...