In the biggest sign of progress since the Paris Agreement, a critical mass of the world economy is now working together to phase out fossil fuels This article is published as part of the global journalism collaboration Covering Climate Now. Good news about climate change ? Hard to believe, but yes. It happened last week in the coal-exporting city of Santa Marta , Colombia, and it ranks as the most promising climate news since the Paris Agreement was signed in 2015. For the first time, a critical mass of the world economy is working together to phase out fossil fuels, a step that scientists have long said is imperative to limit global temperature rise to an amount civilization can survive. This counts as good news not least because it shows that meaningful change is possible, a belief that has been hard to sustain over the past decade.…