SAN DIEGO (CBS 8) - The County will hold its gas-power lawn mower exchange on Saturday at Qualcomm Stadium.

San Diegans can receive a re-chargeable electric mower in exchange for a working-gas powered one, along with $99.

The county holds the event each year as part of its efforts to cut out pollution from gas mower emissions.

This year, 650 electric mowers will be available.

More than 7,600 gas mowers have been turned in since the exchange started 16 years ago.