Ah, to see green again! Trees, gardens and lawns are coming alive quickly. That means, of course, a bit of work for us in caring for those precious living things, including that unending lawn mowing. To green up that process as well, consider mowing this year with an old-fashioned push mower instead of a gas-powered mower. If you don’t have huge territories to cut, today’s push mowers are virtually as convenient as gas mowers. They are much lighter-weight and easier to handle than the ones you used as a kid, and they don’t produce pollutants or greenhouse gases.