Submit your letter to the editor via this form. Read more Letters to the Editor. Bay’s health is critical to health of region Re: “Invest in Bay Area’s greatest asset: Nature” (Page A8, Aug. 24). Andrea Mackenzie reminds us to invest in our greatest asset, nature, by enlightening us about the quiet miracles of Coyote Valley. Yet the greatest, most tireless of nature’s ecosystems is one we all often overlook, the Bay itself. The Bay is often valued only for its inimitable beauty and recreational opportunities, but its natural shorelines, marshes and wetlands labor every moment of every day to...