Xavier Harding is a former journalist, current content producer and the host of this year’s MozFest climate justice panel: Revealing the Internet's Invisible Carbon Footprint. At Mozilla Foundation, Xavier writes about issues concerning tech’s effect on society and the people that live within it — from how test proctoring software struggles to see dark-skinned faces to the ways AI acts with the same biases humans do. More recently, Xavier has focused on the ways everything we do online emits carbon and the lack of transparency around exactly how much. Xavier spends an embarrassing amount of time on the puns and jokes in his writing. So far it hasn’t paid off.