In India, the environmental clearance process is governed by the Ministry of Environment, Forest and Climate Change (MoEFCC). The process involves obtaining necessary approvals for various types of projects to ensure their environmental sustainability. Here are some key points about the environmental clearance norms and the time taken for the process in India:

• Environmental clearance is required for projects falling under the categories listed in the Environmental Impact Assessment (EIA) notification of 2006.
• Projects are classified into two categories: Category A requires a mandatory environmental clearance from the MoEFCC, while Category B projects are assessed and cleared at the state level.
• The time taken for environmental clearance varies depending on the type and scale of the project.
• For Category A projects, an environmental impact assessment report needs to be submitted, followed by subject wise appraisal by expert committees at different stages.
• The time taken for environmental clearance for Category A projects is around 6 to 9 months.
• For Category B projects, the state-level environmental impact assessment authority assesses the project and grants clearance based on the applicable norms.
• The time taken for environmental clearance for Category B projects is generally shorter than Category A projects, typically 4 to 6 months.

Please note that these timeframes are approximate and can vary on a case-by-case basis.