In this subtitle the following words have the meanings indicated. “Eligible material” means any cement or concrete mixture used in the construction of an eligible project. “Eligible project” means a capital project described in § 3–602.1(c) of this article. “Eligible project” does not include any maintenance program for the upkeep of an eligible project. “Global warming potential” means the degree that a given mass of a chemical contributes to global warming over a given time period when compared to the same mass of carbon dioxide. “Greenhouse gas” has the meaning stated in § 2–1202 of the Environment Article.