Other investors might be green with envy. This year, clean energy investments have been absolutely smashing it, technically speaking. Even with headwinds such as turbine projects being halted and tax credits for renewable energy fast-tracked for expiration, returns in the sector have outpaced the wider market, running laps around the S&P 500. That has caused a crunch to get projects done sooner, ramping up demand for materials and parts like solar panels. So far this year, the S&P Global Clean Energy Tran ...