Before the British arrived, people on the subcontinent used traditional low-cost, low-tech engineering to collect rainwater for thousands of years.
Lime burning is a now-forgotten industry that sustained many agrarian communities before energy became cheap.
Boat mills, bridge mills and hanging mills were almost as widespread as windmills.
Flushing the water closet wreaks ecological havoc, deprives agricultural soils of essential nutrients and makes food production dependent on fossil fuels.
Would it make sense to revive the industrial windmill and again convert kinetic energy directly into mechanical energy?
Replacing tractors with real horse power could be the revolution that agriculture needs.
Drinking bottled water is a more ecological choice than consuming soft drinks, coffee, fruit juice or beer.