Coal units 1-4 are the oldest and most polluting ones in the country, producing about 25% of the main total particulates emissions generated by all sources in the entire country. Unlike block 2, as well as both blocks of the Rutenberg coal plant, a scrubber has not been fitted to the four units of Orot Rabin's block 1. The old, unmodernised coal-fueled units 1 through 4 pollute 10 to 1000 times more per kilowatt than natural gas-fueled power plants, and 3 to 8 times more than a coal plant fitted with scrubbers.