In the poem "Mending Wall" the speaker and his neighbor walk together along a wall, repairing the damage caused by winter weather: Something there is that doesn't love a wall, That sends the frozen-ground-swell under it And spills the upper boulders in the sun, And makes gaps even two can pass abreast...

VOA: special.2011.04.17

"The plants don't get overstressed under the sun... at the same time they can get nutrients in the water equally, " says Ng.

CNN: Urban farming looking up in Singapore