Few companies in their field- geothermals by using direct heat...

Few companies in their field
- geothermals by using direct heat to desalinate instead of making electricity first
- ECT (ASX: ESI)who have water as a byproduct of dewatering brown coal.

Also very simple things like rainwater tanks. Our new 10,000 litre tank filled up in 1 week. Victoria is supposed to be 155L per person per day so 1 week of rain gave 15 weeks of water supply for a family of 4.