By fermentation, the yeast species Saccharomyces cerevisiae converts carbohydrates to carbon dioxide and alcohols â for thousands of years the carbon dioxide has been used in baking and the alcohol in alcoholic beverages.
In a memo last September, President Obama said the United States would admit up to 70,000 refugees to the United States during Fiscal Year 2015, as justified by humanitarian concerns or the national interest. The number breaks down as follows: Africa................................17,000.
Media caption UN refugee chief Antonio Guterres said refugee numbers had not risen at such a frightening rate since the 1994 genocide in Rwanda. The conflict in Syria has caused the world's worst refugee crisis for 20 years, with an average of 6,000 people fleeing every day in 2013, the UN says.UN refugee chief Antonio Guterres said refugee numbers had not risen at such a frightening rate since the 1994 genocide in Rwanda.edia caption UN refugee chief Antonio Guterres said refugee numbers had not risen at such a frightening rate since the 1994 genocide in Rwanda. The conflict in Syria has caused the world's worst refugee crisis for 20 years, with an average of 6,000 people fleeing every day in 2013, the UN says.