Articles Writer required

Hi all, I am looking to get 20 articles written of about 350 words, some may required around 750 words. The topics will be related to science, nature and the environment (this information will be made clearer later). However you should be able to do a little research. Topics for each article will be provided and in some cases I will supply the research material. please quote based on 350 word articles.

I am looking for someone that I can work with regularly and not on this one set of articles.