This isn’t your average science fair. Taking place on the High Line—that elevated train track in Chelsea, now a lush garden designed by the incomparable Piet Oudolf—Laurene Powell Jobs’s Emerson Collective honors Climate Week with an unlikely display of optimism. The aim is to showcase problem-solvers and their innovative ideas. The interactive exhibits allow you to meet people who are breaking ground with revolutionary advances in farming, activists who have turned to art to spread awareness, and grassroots companies who have invented save-the-earth technologies. —Clara Molot