Here at The Orbital Index, we think there are zero issues more important than the changing climate of our planet. We still believe in the bygone preamble to NASA's mission statement from the early 2000s: “to understand and protect our home planet.” And, as we begin the 2020s, we hope this special ‘Climate Mode’ issue inspires you to grapple with the problem that will define this decade and find ways that you can get involved.