A citizens' group concerned with overpopulation says Vermont is headed in an unsustainable direction.

The group says development and energy consumption are hurting the environment.

And Vermonters for a Sustainable Population say the trends could lead to the loss of many qualities of life for which Vermont is known.

In its report titled ``Disappearing Vermont,'' the group measured changes in land use, air and water quality, wildlife and weather since 1970.

The state's population has grown 40 percent in that time.

The group says population growth plays a part in rising real estate prices, longer commutes and global climate change.