He says knowing how to do this may be especially valuable if fossil fuel should become unavailable.

VOA: special.2009.04.14

Gardens should be planted away from roads and structures, especially old buildings.

VOA: special.2009.06.09

He says industrialized economies should intensify technology transfers to developing nations, especially on environmental technology to prevent what he called a "green divide."

VOA: standard.2009.11.13