Relating to public contracting preferences in procuring certain materials; declaring an emergency.

Requires Department of Transportation to establish pilot program to assess how products that department or contractor for department procures affect emissions of carbon dioxide. Provides that pilot program must require prospective contractors to declare environmental product cost of certain products in response to invitation to bid for public improvement contract. Requires department to determine lowest responsible bidder after adding environmental product cost to product. Provides that local contracting agency may adopt practices of department. Requires all state contracting agencies to adopt practices of department beginning January 1, 2021. Requires Department of Environmental Quality to adopt and keep updated rules for calculating environmental product cost of certain products. Becomes operative January 1, 2018. Declares emergency, effective on passage.