<page_title> City Nature Challenge </page_title> <section_title> Results </section_title> <table> <cell> 2 <col_header> Cities participating </col_header> </cell> <cell> 2017 <col_header> Year </col_header> </cell> <cell> 16 <col_header> Cities participating </col_header> </cell> <cell> Over 125,000 <col_header> Total observations </col_header> </cell> </table>
In 2017, City Nature Challenge expanded to 16 cities and the participants collected over 125,000 observations.