PD 1151 and 1152 establish the basic environmental protection laws and policies for the Philippines. PD 1151 establishes the state policy to create conditions for people and nature to thrive in harmony. It recognizes the people's right to a healthy environment and requires environmental impact assessments for projects. PD 1152 implements a comprehensive environmental protection program, establishing standards and policies for air and water quality, land use, natural resources conservation, waste management, and other areas. It aims to balance environmental protection and sustainable development.