Modern wastewater plants are effective at processing organic solids into fertilizer products (known as biosolids), with advanced facilities also capturing methane for energy production.

In addition to biological sequestration, they might pay to capture methane at landfills, switch from diesel to other less polluting emissions or pay for energy efficient light bulbs.

Study of the greenhouse gas emissions from slurry storage and ways of reducing them by adopting technologies such as anaerobic digestion to capture methane for energy and organic fertilizer.

Until the more productive method was developed in recent years, high costs discouraged energy companies from trying to capture methane from the coalbeds.

They included stanching pipeline leaks and capturing methane from landfills.

The main actual policy described yesterday was an array of tax credits for planet-friendly activities, such as installing solar power or capturing methane from landfill.

In the last two years, various state and federal agencies have subsidized purchases of digesters, since they capture methane - a potent greenhouse gas - before it escapes into the atmosphere.

Also, the implementation of technologies to capture and utilize methane from sources such as landfills, coal mines, and manure management systems affects the emission levels from these sources.

Recently there has been interest technology which would capture methane produced from lagoons and sell it as energy.

The project captures methane from decomposing garbage to generate electricity.