Complex sentence: Composting in a scientifically designed plant will improve the local environment by reducing health hazards created by the present practice of dumping of waste in open dump sites and will also sequester the emission of methane generated in the process of anaerobic decomposition of bio-degradable matter.
Split into simpler sentences: Composting in a scientifically designed plant will improve the local environment, reducing the health hazards created by the present practices of dumping waste in open sites. It will also sequester the emission of methane gas generated in the process of anaerobic decomposition of the bio-degradable matter.