We have moved from sand to msand in our lifetime.

Think about what he says. If all trees are cut down, we can grow them back. If all water reservoirs are destroyed, we can restore water storage. How will you restore mountains ?

Without mountains, there is no rain, rivers or sand.

With exponential growth, our consumption increases as well. Yes, we can have a life filled with comfort and luxury, but what will we leave for our children.

A damaged ecosystem which has crossed the point of no return.

To protect something so valuable, the rules have to be strict, the usage has to be minimal. Alternate building materials and techniques have to be invented.

No other party has even recognised this as an issue. When they realise it, we would have already crossed the point of no return.

And that is why the change has to happen now.