Fact or factoid? Should we have more des(s)erts?

What'd be bigger sink, better alternative for the health of the planet ... a desert or aforested desert?

Edit: https://www.ibtimes.com/deserts-are-key-carbon-dioxide-sinks...

"It is worth noting that, although the sink in this experiment is significant, it is … about a hundredfold less than typical sinks in young forested ecosystems not exposed to elevated carbon dioxide," Christopher Field, director of the department of global ecology at Stanford University’s Carnegie Institution for Science, told NBC News. “The bottom line is that deserts will not save us from climate change."