whAt DoEs thE nEw systEm EnABlE FArmErs to Do
A．proDuCE lArgEr vEgEtABlEs.
B．trAnsport proDuCE morE quiCkly.
C．grow Crops in nontrADitionAl ClimAtEs.
D．kEEp vEgEtABlEs FrEshEr For A longEr pErio