If you want my thoughts.....your answer is the only one that will (possibly!) have a positive impact on the world.
Morals and ethics are subjective. As this thread shows. Everyone here is suggesting what they believe would be the right thing to do and even within this small sample population, not everybody agrees on what "right" is. No matter what anyone did, someone would complain about it. You're not doing enough, you're doing too much, you're not doing the things you should, doing the right things wrong, you're being too involved with social development, not involved enough, blah blah blah. Governments will target you. If you bend the knee to one, the others will go after you. Bend the knee to none, and they'll all go after you. If you possess power but belong to no one, they'll call it "accountability" and try to stop you, even if what you do supports and bolsters them. And if your actions don't support them they'll label you a terrorist. They won't dare allow such a powerful wild card on the table no matter what you do. So bottom line, if you've got Clark's powers, unless you're so low key you don't do anything at all, you'll have at least half the world against you no matter what. They'll spend more time arguing and politicizing your actions than they'll spend actually
considering your actions.
But you know what everyone ultimately agrees on? Successful economics. Even if they hate that it's successful, everyone likes having money put in their pocket. So you wanna tackle climate change, you don't blow up factories. They'll just build more and hate you for killing jobs, and learn nothing. But if you create a green technology that is more effective and cheaper, and then you bring that to the market? Consumers will shift to the superior, cheaper product and manufactures will have to go where the demand is or go bankrupt.
Now, even with your "do science!" idea, there'll be friction. People will lose their jobs. There'll be pushback from lobbyists. You're still not going to be popular. And they'll try to limit your influence. But if you pull it off and actually get your innovations out to the public competitively, and it's an obvious and clear upgrade that makes lives easier, the economics will force a win for you. Not because you're morally right but because you'll be too wealthy and influential to stop. Eventually they'll have to adopt your practices just to stop you financially, and at that point it's too late to regress. People don't let go of advancements once they have them.
So, your plan to start a business and introduce new technologies is the only plan that has a chance of succeeding. The rest of us, whether we're just putting out fires and hoping we inspire change, or those of us who are going to throw people into space.....all we're doing is making ourselves public enemy #1, because someone with Superman's abilities in the real world is too radical an idea to be anything but destabilizing. But saving the world through economics......that's actually how it works. That's how the world is really changed; business and innovation.
So if any of us get powers I hope it's you and I hope you're really good at inventing and selling stuff.
If you need some marketing help, let me know.