Varsity workers begin warning strike ground activities

It seems like you're referring to a news article or a situation where varsity workers have started a warning strike, which means they are giving a formal notice to their employers that they will stop working if their demands are not met.

Here's a possible summary:

"Varsity workers, who are members of a labor union, have begun a warning strike, halting ground activities at the institution. The workers are demanding better working conditions, higher wages, and improved benefits. The strike is expected to continue until their demands are met, and the university administration has been urged to negotiate with the workers to resolve the issue. The strike has caused disruptions to the normal functioning of the university, with classes and other activities being affected. The workers are determined to fight for their rights and are prepared to continue the strike until their demands are met."

Please let me know if you'd like me to add or modify anything!