Climate change is destroying our path to sustainability. Ours is a world of looming challenges and increasingly limited resources. Sustainable development offers the best chance to adjust our course. Ban Ki-moon

Change is a continuous process. You cannot assess it with the static yardstick of a limited time frame. When a seed is sown into the ground, you cannot immediately see the plant. You have to be patient. With time, it grows into a large tree. And then the flowers bloom, and only then can the fruits be plucked. Mamata Banerjee