hi
5 ways to save energy and electricityAdjust your day-to-day behaviors.Replace your light bulbs.Use smart power strips.Install a programmable thermostat.Use energy efficient appliances.Reduce water heating expenses.Install energy efficient windows.Upgrade your HVAC system.
I think that a) is chemical, and b) would be chemical
The answer to your question is Aksum
According to research, Brazil, Argentina, and Columbia all have the highest GNP.
