US federal regulators have issued a final environmental impact statement (EIS) for NextDecade's Rio Grande liquefied natural gas export facility in Texas, suggesting that the facility alone would have a limited impact on the environment on its own if mitigation measures are put in place, writes Caroline Evans.

However, the Federal Energy Regulatory Commission (Ferc) again cautioned that combined with other projects planned in the area around Brownsville, Texas, there could be a significant cumulative impact.