Yea, it does feel like there must be some fine print behind that number. FWIW, the Minister's twitter account does specify tree seedlings, so it doesn't sound like they just airdropped 350 million seeds or anything like that.

Though the limiting factor on how fast you can plant trees is more the production of seedlings than the physical labor of planting. So I guess if they've spend the last several months growing and distributing seedlings in preparation for this campaign, actually plainting them all in one day isn't so crazy