>>spaceh+(OP)
From what I've read (can't find the source, sorry), it did have an effect, but it needs to repeat every year on top of the previous one to have the effect to stay below the 2.0 celsius avg.
>>spaceh+(OP)
A significant fraction of commuting by information workers stopped during COVID. Nothing like the whole world stopping, but yes, it would make a difference if the reduction in commuting could continue.