Global warming: global uppvärmning
Climate change: klimatförändring
Greenhouse effect: växthuseffekt
Vi behöver några hållbara lösningar!
In general, the present tense can certainly have futural meaning. In real life, you can usually tell from context. In this course, the idea is that futural translations should be accepted when there's some foundation in the sentence for that interpretation. But I don't think there's any reason to think this sentence is about the future unless you add something that isn't there.