With the help of a $75,000 grant from Wal-Mart Inc., Purdue University scientist Cary Mitchell plans to build a greenhouse that will enable vegetables to be grown during the winter in Indiana.

The plan is for the greenhouse to trap heat and moisture when the water used to cool the university's coal-fired boilers is piped underground, according to an Associated Press story. The process should warm the soil enough to grow crops during the colder months.

With the Wal-Mart grant, Mitchell has more than half the funds he'll need for the project, the AP reported.