With the 2015 Paris Climate Agreement, 197 countries agreed to set emission targets that would limit global temperature rise 1.5 degrees Celsius by capping greenhouse emissions at "net-zero" -- or absorbing as much carbon as they emit -- by 2050. So far, only two countries (Gambia and Morocco) are hitting their targets, while the biggest emitters are falling flat, or ignoring their goals entirely. How can we hold these countries accountable? Enter the Climate Action Tracker.