From its roots in the former International Lawn, Garden & Power Equipment Expo trade show, the Green Industry and Equipment Expo has tended to be long on equipment and short on green. But at the 2008 event, held last week in Louisville, Kentucky, many companies, even heavy-gear manufacturers, got in on the green act.

Trumpeting one's claimed pro-environmental efforts is good public relations, of course, but some equipment makers have another motivation to market eco-friendly products: The latest U.S. Environmental Protection Agency regulations for curtailing the emissions of small, nonroad engines allow for low- or no-emissions gear to offset the emissions of relatively gas-guzzling products.

Here's some of what I saw at the expo:

The first zero-emissions ZTR emerges. Zero-turn-radius mowers and zero emissions might seem an unlikely couple, but with the electric Zeon (shown), you'll be able to get a no-emissions ZTR mower. Outfi