What is the main idea of sustainable development?

A. वर्तमान जरूरतों को पूरा करते हुए भविष्य की जरूरतें सुरक्षित रखना / Meeting present needs while protecting future needs

Step 1: Identify sustainable development. Step 2: It balances development and environmental protection. Step 3: Remember sustainable means present plus future balance.

Step 1: sustainable development पहचानें। Step 2: इसमें विकास और environmental protection दोनों का balance रखा जाता है। Step 3: Sustainable means present plus future balance याद रखें।