Bill McGlashan, co-founder of the start-up Oath, which uses a blend of microscopic organisms to improve yield and quality of food crops, reducing water and fertilizer use, near the company’s headquarters in San Francisco.

Bill McGlashan, co-founder of the start-up Oath, which uses a blend of microscopic organisms to improve yield and quality of food crops, reducing water and fertilizer use, near the company’s headquarters in San Francisco.