How much profit is there in current antibiotics? Only a few of the newer ones are still patented. Aren't the bulk of prescribed antibiotics generics?
I don't think it's because of a difference in the profit to be made by solutions (green energy vs antibiotic alternatives), but rather because of a difference in the profit to be made by the status quo (hydrocarbon-based energy companies stand to make huge profits if they can delay the development of green alternatives until there's a major energy crunch).
Antibiotic resistance is more obviously traceable to antibiotics use. The greenhouse gasses link to global warming exists, but the skeptics have leverage against it: Western countries contribute more to global warming per capita (right?), but China and India are contributing more overall; anything we try to do is going to be very expensive and cause a modest slow-down of warming at best; the Earth has been warmer than it is now; global warming models are incomplete; the Earth is a very complex dynamic system that might buffer global warming in unknown ways before we get to a crisis.
It's more difficult to argue against antibiotic resistance in bacteria being a problem when we can see resistance develop in a lab, and when we've seen the dire consequences of plagues in documented history.