Co-helmed by Inglourious Basterds‘ and Now You See Me‘s Mélanie Laurent, environmental documentary Tomorrow continues to stir up the French box office (check out the trailer above). Already the biggest theatrical doc of 2015, its ticket sales jumped by 29% this week — its 6th frame during a competitive series of sessions that has included Star Wars, The Hateful 8 and local smash Babysitting 2.

Mars released the movie on December 2 in France, after it served as the opening night film of the Cop 21 United Nations Climate Change Conference in late November. It opened to about 58K admissions and this week sold nearly 71K, the biggest frame of its run. The total is now 373K. That’s no where near the top-grossing French documentaries of all time, but does put it squarely in the Top 15 of the last 15 years.

The doc-cum-road movie was inspired by a the publication of a study forecasting the possible extinction of mankind by 2100. It sees Laurent and co-director Cyril Dion travel to 10 countries on the hunt for the reasons for, and solutions to, some of the major environmental issues facing the world. Non-profit orgs are now seeking out the film.

Sold by Elle Driver, whose co-founder Eva Diederix is here at the Unifrance Rendez-Vous with French Cinema, deals were previously closed with sizable distributors in Benelux, Switzerland and Poland. Further negotiations are underway as the film seeks a path to mainstream audiences around the world.