Global warming is a justice issue. It's a justice issue because global warming is theft - theft from our own children and grand children, of their right to a livable future. It's a justice issue, because its victims are, and will be, disproportionately poor and of color, those least able to contend with or to flee, the storms, droughts, famines, and rising tides of global warming.
Still others commit all sorts of evil deeds, claiming karma doesn't exist. They erroneously maintain that since everything is empty, committing evil isn't wrong. Such persons fall into a hell of endless darkness with no hope of release. Those who are wise hold no such conception.