I work in climate tech and I think GPT-3 will be very helpful for us in researching new projects to tackle.
I tested it on a few subjects that we're working on and it provided really good feedback. It's not always correct, but neither are the humans we ask for feedback on projects. So that's one example of how GPT-3 can help with global issues.
Another issue is access to education. GPT-3 can speak many languages and can be used by people to learn things. Of course, it's not always right, but the same can be said for human teachers. For instance, my girlfriend is learning about financial instruments and will be using GPT-3 to help her. She has regular training materials, but it's also helpful to talk about the subject with someone.
Human teachers are great, but they're not always available and don't always respond quickly. So there you have it, two SDG goals, education and climate change, that GPT-3 can help with.