Webcor -- a name that people in California see emblazoned on construction cranes and job sites all over the state -- will become a limited partner in a green building fund managed by Navitas Capital. Last month, the two companies signed a strategic agreement under which Navitas agreed to help Webcor identify promising greentech startups. The two deals underscore the growing momentum for green buildings. Webcor is the largest builder in California and a substantial portion of its revenue comes from LEED-based projects. By teaming up with Navitas, Webcor potentially will be able to find out about emerging green building technologies and even profit from them. Small companies,...