ส�ำนักงานคณะกรรมการสิทธิมนุษยชนแห่งชาติ interdependence. Since human rights are rights that cannot be separated from each other, the usage of one particular right has to consider any impacts on other rights. Similarly, violation one type of right might have impacts on the violation of other type of rights. In addition, human rights can be historically divided into three generations: the first generation of human rights are civil rights and political rights; the second generation of human rights are social rights, economic rights and cultural rights; and the third generation of human rights are collective rights such as right to development, right to good environment, etc. It must be noted that the third generation of human rights are not yet accepted by scholars and practices of most countries. Human rights can be classified into two groups: substantive rights which mean rights that have their own contents completely such as right to life, right to health, etc.; and procedural rights which mean rights that function as process and means leading to the protection of substantive rights such as right to information, right to participation in decision-making process, and right to access to justice. Human Rights and Environment International documents in form of “soft law”, namely Stockholm Declaration and Rio Declaration which are documents having no legally binding for any State to comply with, play vital roles at the international human rights law forum in recommending principles or concepts on managing the relation between human and nature, building awareness on environmental protection, having influence on the development of right to environment in forms of substantive rights, procedural rights and rights of indigenous people, and finally causing the use of human rights as one mechanism in protecting environment at both international and regional levels. Although most international documents in form of “hard law” relating to environmental protection adopt principles from the Stockholm Declaration and the Rio Declaration, none of them has contents recognizing the right to environment as one type of human rights except one particular document namely the African Charter on Human and Peoples’ Rights and its protocol: the Additional Protocol to the American Convention on Human Rights in the area of Economic, Social, and Cultural Rights. The Charter establishes the new kind of human rights called “right to good environment favorable to development”. 12