As Labor Day came and went in the United States over the weekend, style-conscious clotheshorses put away their whites in favor of browns, greens, and greys; community pools closed their gates; barbeque grills were sheathed for the season. All are signs that summer has come and gone. We at NextBillion must add a final sign - the departure of our trusty summer intern, Ethan Arpi.

Ethan joined our team in June, contributing news and blog posts and plenty of analysis. Readers have enjoyed Ethan's focus on Latin America, the culture of the BOP, and all things sustainable. While he will be missed by NextBillion readers and by our staff, he hasn't gone far - Ethan's taken a fresh internship with the World Resources Report, WRI's flagship publication.

Good luck at WRR, Ethan, and we hope you'll contribute some guest content from time to time.