Articles about the environment?

for a science project i need to find 4 articles about the environment.
i then need to write the 4 key points, my response, and why i picked the articles.
they are not allowed to be published before august 1st, 2008.

i have found 2 so far, but i cant find any more that are short and are published after august 1st.

if you could please help me find 2 more, or a website that has some short articles, that would be great.

thanks in advance.