Increasing inequality within a country can exacerbate dilemmas of redistribution and social cohesion, and affect the willingness of rich and poor to accept lifestyle changes for mitigation and policies to protect the environment (medium evidence, medium agreement) {2.6.1, 2.6.2, Figure 2.25} Estimates of future CO 2 emissions from existing fossil fuel infrastructures already exceed remaining cumulative net CO 2 emissions in pathways limiting warming to 1.5°C with no or limited overshoot