To repair a crumbling relationship, Sally and Tim Metcalfe arranged a sit down dinner, for “real discussions” only. And what’s more real than the climate? thought Sally. So, she set off on a (very valid) point on the relationship between human action and climate change, and in response Tim called her out on the role they both play in air pollution. May not be the most romantic conversation in the world – as Tim sarcastically pointed out, but definitely a necessary one.