There was no shortage of bad numbers for the world's climate future this year. You could read them off by the dozens. But there were also a whole bunch of good ones. One day. Four million people. Six thousand events in more than 1,000 cities across 185 countries. And that was just one day of action out of many held over the year. This, finally, was the year that people took to the streets en masse demanding change. As the situation becomes more dire, the calls to action become more critical—and perhaps in 2019 the world finally hit a tipping point. Certainly Canada's politicians heard the demand—every major party released a comprehensive climate plan and voters cited it as a top-three issue in almost every survey. But will this make a difference going forward, or are the changes to our ecosystems too baked in to be stopped now? GUEST: Catherine Abreu, Executive Director, Climate Action Network Canada