Independent: Amid the hanging gloom of recession there are occasional shafts of optimism. One of these is the evidence that careers in the environmental sector are showing some resilience in the downturn. This is due in part to an acknowledgment of the business case for healthy environmental practices. Senior figures in the sector also point out a clear political lead coming from Whitehall, which is consistent with their own optimistic view. "The Government’s low-carbon strategy sends the message …