what do we need most more grass or trees

Question: what do we need most more grass or trees

Asked by sutcliffe to Upul, Phil, Ian, Derek, Daniel on 21 Jun 2010 in Categories: General.
- Derek Mann answered on 18 Jun 2010:
  
  Trees, we are loosing lots in the rain forest and we need them for keeping our climate in balance.
- Daniel Mietchen answered on 19 Jun 2010:
  
  We need a diversity of places that different species can inhabit, and it all has to fit with the local climate.
  
  Grassland is not a desirable replacement for rain forest, and trees won’t grow high in Arctic climate.
- Ian Sillett answered on 21 Jun 2010:
  
  That depends if you want to play football, have a picnic or build a tree house doesn’t it?

Question: what do we need most more grass or trees