Which garden plant consumes the most carbon dioxide?

Question

Which garden plant consumes the most carbon dioxide?

Answer 1

In effect, the ones that grow the fastest. CO2 consumption translates fairly directly into dry weight gain. So look for the plants that produce the greatest biomass per hectare per year.

Answer 2

Lawn type grasses by surface area.  In fact an acre of most common wild grasses consumes more CO2 than an acre of forest.