When I first moved to Napa Valley many years ago, olive trees were everywhere, both on the hillsides and in the valley. There was a large grove high on a hill on Silverado Trail, but over the years those trees have disappeared.
I love salads. A salad with my dinner is almost as essential as a glass of wine. When most of us think of a green salad we think of lettuce. Lettuce has been cultivated for thousands of years. The word lettuce comes from the Latin for milk, due to the milky liquid it produces when a leaf is broken.
Every gardener has the ability to have a positive and significant influence on earth's warming climate. Improving soil by adding organic material like compost helps the life in earth's over-tilled and compacted soil. Try thinking of the soil in your garden as a living body.