Complex sentence: The 2M Group believes that the Government and the industry consistently overstate the economic benefits of aviation and fail to measure the full environmental costs andt should commission an independent cost-benefit analysis for all expansion proposals.
Split into simpler sentences: The 2M Group believes that the Government and the industry consistently overstate the economic benefits of aviation and fail to measure the full environmental costs. We believe the Government should commission an independent cost-benefit analysis for all expansion proposals.