swimming

The New York Times covers chlorine alternatives for swimming pools.  Swimming pool chlorine can be harsh on your skin and often requires a lot of maintenance.  Many in the pool industry still believe that chlorine is the best option, but there are a number of chlorine substitutes coming to the market that provide a greener alternative.

British guy swims half a mile in the North Pole's freezing waters to pull a signal on Global Warming.

This is a good article that discusses the various suppliers of residential solar swimming pool heaters. The article discusses the cost trade-offs vs. gas and electric. It is a great jumping point for investing solar for your pool.