The new triangular, 40-foot-tall greenhouse at the southern end of Greenfield Community College reaches skyward, and has a new, multi-pronged permaculture garden being planted at its base. It’s as if to say the sky’s the limit for this most grounded of GCC’s new initiatives: Farm and Food Systems. At the close of the first year of sustainable food and farming as a major, with 18 students participating, the enthusiasm is as palpable as the humming of bees in one of the four “re-skilling” courses being offered. The nearly $600,000, near-zero-net-energy greenhouse — with heavily insulated walls, solar-heated water to warm growing beds and ventilation for … 0