What is the meaning of biomass gasification, is it a new technology?

Biomass gasification means incomplete combustion of biomass resulting in production of combustible gases, including Carbon monoxide (CO), Hydrogen (H2), Methane (CH4), CmHn, this mixture is called pyrolysis gas that can be used to run internal combustion engines, and generate CHP. Gasification is a century old technology, which flourished quite well before and during the second world war. Today, because of increased fuel prices and environmental concern, there is renewed interest in this century old technlogy. Gasification has become more modern and quite sophisticated technology.