Your gas may smell like rotten eggs because of the sulfur in fiber-rich foods. Sulfur is a natural compound that smells like spoiled eggs. Many vegetables are sulfur-based. If this is causing your flatulence, a simple change in diet will be sufficient treatment.
This is because saltwater is a good conductor of electricity which makes ocean water a resource for renewable energy. When you put salt in water, the water molecules pull the sodium and chlorine ions apart so they are floating freely, increasing the conductivity.
Salt is one commodity which traditionally has a very inelastic demand. As price of salt rises, people (and county councils) are going to be willing to pay the higher prices. The elasticity of supply appears to be reasonably responsive, with councils taking imports from abroad.