The correct answer is Automatic Number Plate Recognition (ANPR) cameras. In News • The Uttarakhand government will implement a green tax on all vehicles entering the state starting December 2025, using Automatic Number Plate Recognition (ANPR) cameras for automated collection. Explanation & Key Takeaways: • The green tax will be collected using ANPR cameras installed at 37 state entry points, automating the process and reducing manual toll booths. • The tax rates vary by vehicle category, from ₹80 for small private vehicles to ₹700 for trucks depending on their weight. • The fully automated system ensures real-time tax collection and reduces the scope for evasion or leakages. • The initiative aligns with Uttarakhand’s Clean Uttarakhand Mission, focusing on sustainable tourism and pollution control. Related Concepts: • Green Tax Mechanism • Varies by vehicle category, with rates ranging from ₹80 to ₹700. • Ensures a fully automated, digital tax collection process using ANPR cameras. • Environmental and Policy Objectives • Aims to discourage unnecessary vehicular entry into eco-sensitive zones, reduce emissions, and generate revenue for environmental protection projects. • Supports sustainable tourism and air pollution control in Uttarakhand’s hill stations and pilgrimage centres. • Green Tax in Other States • Similar green tax policies are active in states like Himachal Pradesh, Maharashtra, and Karnataka, focusing on reducing pollution and supporting eco-friendly transport policies. • National Significance • Uttarakhand’s adoption of the automated green tax system sets a national precedent for eco-sensitive transport policies and sustainable tourism management in hilly regions.