Carbon dioxide is released in cement manufacturing when fuel is burned and limestone is heated.

VOA: special.2009.12.01

Michelle Obama spoke about the action plan when it was released last month.

VOA: special.2010.06.07

That is when the first Global Biodiversity Outlook report was released.

VOA: special.2010.05.25

Both subjects are high priority for Seoul. Six South Koreans drowned last month when the North suddenly released water from a dam, flooding camping areas in the South.

VOA: standard.2009.10.13