Route 1 Constitution offers no single environmental provision → protects through an enabling spread of duties, directives and rights → deepened by the courts.

Route 2 Environmental protection sits in the Constitution as an enabling framework → Directive Principles + Fundamental Duty + judicially expanded Article 21 → both strength and limits flow from this.

Directive Principles set the state’s duty (Art 48-A environment/forests/wildlife; Art 47 public health; Art 48 agriculture–sustainability) → Fundamental Duty Art 51-A(g) makes the citizen responsible → enforceable core Article 21 → Supreme Court reads in a right to a healthy, pollution-free environment → Dehradun Quarrying + M. C. Mehta strengthen the environmental meaning of life and liberty → PIL via Articles 32 & 226 → statutory backing (Environment Protection Act, Forest Conservation Act).

Provisions enabling, not self-executing → Directive Principles + citizen duty non-justiciable → force depends on judicial activism → central limitation is implementation (disasters, dilution of norms, weak enforcement) → promise stays ahead of practice.

Route 1 Framework enabling by design → limited by non-enforceable directives and the enforcement gap → promise runs ahead of practice.

Route 2 Article 21 jurisprudence gives the framework real teeth → but constitutional protection is only as strong as its enforcement.