Our operations are subject to stringent and complex federal, state and local laws and regulations governing the release of pollutants and materials into the environment or otherwise relating to environmental protection and public health and safety. These laws and regulations impose numerous obligations applicable to our operations, including requirements to obtain a permit or other approval before conducting regulated activities; restrictions on the types, quantities and concentration of materials that can be released into the environment; limitations on activities on certain lands lying within wilderness, wetlands, and other protected areas; and assessments of substantial liabilities for pollution resulting from our operations. For example, a number of governmental bodies have finalized, proposed or are contemplating legislative and regulatory actions to reduce emissions of greenhouse gases, such as monitoring, reporting and emissions control requirements for certain large sources of greenhouse gases and greenhouse gas cap-and-trade programs. Because we emit greenhouse gases through the manufacture of HMA products and through the combustion of fossil fuels as part of our mining and road construction services, any such laws and regulations applicable to jurisdictions in which we operate could require us to incur costs to reduce greenhouse gas emissions associated with our operations.
We have in the past been, and may in the future be, required to remediate contaminated properties currently or formerly owned or operated by us or third-party facilities that receive waste generated by our operations, regardless of whether such contamination resulted from our own actions or those of others and whether such actions complied with applicable laws at the time they were taken. In connection with certain acquisitions, we could assume, or be required to provide indemnification against, environmental liabilities that could expose us to material losses. Furthermore, the existence of contamination at properties that we own, lease or operate could result in increased operational costs or restrictions on our ability to use those properties as intended, including for mining purposes. For example, our lease agreements associated with our aggregates facilities could, if not appropriately managed, subject us to specific reclamation obligations, costs, or liabilities for any contamination or regulatory violations arising from our mining operations.
Numerous government authorities, such as the U.S. Environmental Protection Agency and analogous state agencies, have the power to enforce compliance with these laws and the permits issued under them. Such enforcement actions often involve difficult and costly compliance measures or corrective actions. Certain environmental laws impose strict liability (i.e., no showing of "fault" is required) or joint and several liability for costs required to remediate and restore sites where hazardous substances, hydrocarbons or solid wastes have been stored or released. Failure to comply with these laws and regulations may result in the assessment of sanctions, including administrative, civil or criminal penalties, compensatory damages, injunctive relief, the imposition of investigatory or remedial obligations, and the issuance of orders limiting or prohibiting some or all of our operations. In addition, we may experience delays in obtaining, or be unable to obtain, required permits, which may delay or interrupt our operations and limit our growth and revenue.
In certain instances, citizen groups also have the ability to bring legal proceedings against us if we are not in compliance with environmental laws, or to challenge our ability to receive environmental permits that we need to operate. In addition, claims for damages to persons or property, including natural resources, may result from the environmental, health and safety impacts of our operations. Our insurance may not cover all environmental risks and costs or may not provide sufficient coverage if an environmental claim is made against us. Moreover, public interest in the protection of the environment has increased dramatically in recent years. The trend of more expansive and stringent environmental legislation and regulations applied to our industry could continue, resulting in increased costs of doing business and, consequently, affecting profitability. Additionally, legal requirements are changing frequently and are subject to interpretation. New laws, regulations and changing interpretations by regulatory authorities may increase our future expenditures to comply with environmental requirements, which could adversely affect our business and results of operations.