Here’s a look at some numbers behind baseball–from number of balls (ha!) to number of fans, to pounds of glass recycled. Shamelessly lifted from E’s professional-sports-by-the-numbers list.

160,000. Estimated number of baseballs used per season, about 5-6 dozen balls per game.

30. Approximate number of professional baseball and football teams that use artificial/synthetic turf.

80 million. Number of spectators that Major League Baseball attracts each year.

10. Approximate number of the 30 MLB teams that have “gone green,” according to the EPA.

30 million. Number of hot dogs estimated to be sold at MLB parks in 2008.

5,500. Amount of construction waste, in tons, recycled from the building of Nationals Park.

480,000. Pounds of carbon emissions created by the 18-block-long, 100% recycled “green” carpet for the 2008 All-Star Game Red Carpet Parade (though the emissions were offset through carbon credits).

18. Tons of annual carbon dioxide emissions reduced at Fenway Park stadium by installing solar thermal panels on the roof behind home plate.

180. Number of recyclable containers placed throughout the Pittsburgh Pirates ballpark to encourage recycling of plastic bottles and cans.

870. Pounds of glass the Pittsburgh Pirates recycled in 2008. Also recycled were 5,913 pounds of aluminum cans; 33,547 pounds of plastic; 3.61 tons of mixed paper; 193 tons of baled cardboard and skids of catalogs and 20,100 gallons of used cooking oil.

724. Days it took to build the Washington Nationals’ new ballpark, which was the first green professional stadium in the U.S. and LEED-silver certified by the U.S. Green Building Council.

30. Percentage of overall water consumption reduced by installing water-conserving plumbing fixtures, saving an estimated 3.6 million gallons of water per year at Nationals Park.

6,300. Number of square feet for a green roof above the Nationals’ concession/toilet area that minimizes roof heat gain.

590. Amount of solar panels installed at the San Francisco Giants’ AT&T Park, providing up to 120 kilowatts of energy that will be connected to San Francisco’s power grid.

100,000. Amount, in dollars, AT&T Park saved on garbage disposal fees in one year through its recycling program.