Business Green: Draft legislation is being introduced that aims to tighten up transmission efficiency in the US electrical grid, even as lawmakers criticise the whole system for being insecure. The proposed legislation calls for increased support for renewables, reduced grid congestion and line losses, and diversification of risk, which would presumably mitigate the threat of blackouts, such as the one that took place on the US eastern seaboard in 2003. It would require the Federal Energy Regulatory …