The three types of consent generally refer to 1) "Consent to Establish," which allows the initiation of a new project or activity with potential environmental impact, 2) "Consent to Operate," which permits the ongoing operation of a project meeting specific requirements, and 3) "Environmental Clearance," a formal approval ensuring a project's compliance with environmental standards and its potential effects on the environment. These consents are crucial for maintaining a balance between development and environmental protection.