For countries/governments that doesn't even have or have a very limited garbage disposal, that must mean they pollute very little on paper when in reality people just throw stuff into the ground / ocean etc.
I don't really believe this article. It seems like a typical clickbait shit article actually. Pollution is not only how much CO2 you release into the air, just look at some rivers in India which are incredibly polluted or countries in Africa where people simply burn metal in hunt for rare metals which they can sell. That pollution is probably not included in this statistic which makes me call bullshit on this claim.