Mitigating greenhouse gas emissions and why population controls are ineffective, curbing consumption is useful but culturally challenging, efficiency improvements are great but only slow change, and why net-zero technologies are needed for a complete solution.

For each person earning over $16,000 per year in the richest top 10% of the world there is someone stuck in the bottom 10% earning less than $1,000 per year. As everyone rightfully strives for a top 10% lifestyle emissions could double to over 100 billion tonnes per year and lock-in unknowable damage unless we rapidly transition to a net-zero system.