Net metering: Net metering is a billing mechanism that credits solar energy system owners for the electricity they add to the grid. For example, if a residential customer has a PV system on the home’s rooftop, it may generate more electricity than the home uses during daylight hours. If the home is net-metered, the electricity meter will run backwards to provide a credit against what electricity is consumed at night or other periods where the home’s electricity use exceeds the system’s output. Customers are only billed for their “net” energy use.
Green coal technology: Green coal technology, also know as clean coal technology is a new trend in the use of coal by coal power stations that advocates for the improvement in the efficiency of coal burning (so that no carbon or carbon monoxide particles are produced in the exhaust), and the capture of the gases SO2 and NO2, which are common byproducts that are harmful to the environment surrounding the power stations (which is the whole world).