Dhaka, Sept. 23 -- No natural resource on earth is unlimited or inexhaustible. One day, even nature's richest reserves will run out. Yet, with careful planning and responsible use, humankind can make the most of what nature has provided. Natural resources - air, sunlight, soil, water, forests, minerals, and wildlife - are the foundation of life, sustaining human needs for food, shelter, energy, and survival.

But not all resources are renewable. Fossil fuels like oil, gas, and coal, once consumed, cannot be replenished. Others - such as sunlight, air, and flowing water - can be renewed if used wisely. Water, however, is both the most essential and one of the most vulnerable of these resources. Today, Bangladesh, especially its northern di...