पर्यावरणीय बाह्यता (Environmental Externality) को विभिन्न तंत्रों का उपयोग करके आंतरिक बनाया जा सकता है। रोनाल्ड कोस द्वारा कौन सा तंत्र सुझाया गया था?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?