longer answer: while there is a short term gain from the pendemic, with less humans driving, flying, cruising, etc. HOWEVER this is not a good thing. This is a small blip in the overall global warming fight, we need to reduce emissions by A LOT over a long period of time. To trully see the benefits we need a deadly pandemic (maybe even more deadly than COVI-19 to scare people enough) to be happening yearly, making tourism and such a thing most people avoid.
If this will permanently destroy the cruise industry, and slow down flights for multiple years, this would be great. But it most likely won't. So while we may have received a momentary pause because factories are shut down, we might see things like china removing emission regulation in an effort to make up for lost manufacturing.
This must not stall the global warming debates and policies.