UPDATED 1:07 AM EST, February 14, 2013
Microsoft founder Bill Gates and Mexican telecom magnate Carlos Slim donated a total of $25 million to build a new cluster of biotechnology labs at the International Maize and Wheat Improvement Center in Mexico.
The facilities include hothouses "with high-efficiency air particle filters and a water treatment plant to prevent pollen and genetically modified material from escaping to the outdoors," according to a statement by the billionaires' foundations.
