Grist: Im a climate scientist who doesnt fly. I try to avoid burning fossil fuels, because its clear that doing so causes real harm to humans and to nonhumans, today and far into the future. I dont like harming others, so I dont fly. Back in 2010, though, I was awash in cognitive dissonance. My awareness of global warming had risen to a fever pitch, but I hadnt yet made real changes to my daily life. This disconnect made me feel panicked and disempowered. Then one evening in 2011, I gathered my utility...