We don’t recommend taking personal actions like limiting plane rides, eating less meat, or investing in solar energy because all of these small tweaks will build up to enough carbon savings (though it could help). We do so because people taking action in their personal lives is actually one of the best ways to get to a society that implements the policy-level change that is truly needed. Research on social behavior suggests lifestyle change can build momentum for systemic change. Humans are social animals, and we use social cues to recognize emergencies. People don’t spring into action just because they see smoke; they spring into action because they see others rushing in with water. The same principle applies to personal actions on climate change.
Read Reducing Your Carbon Footprint Still Matters by Leor Hackel and Gregg Sparkman at Slate.