Alphabet Inc.’s Google Inc. cut fuel use and traffic delays by 10 percent to 20 percent at four locations in Israel by using artificial intelligence to optimize signal lights and it next plans to test the software in Rio de Janeiro, the company said on Wednesday. The early-phase research project is among new software initiatives inside Google. Google plans in the coming weeks to allow its Nest thermostat users to buy renewable energy credits for $10 a month to offset emissions from heating and cooling. Credits will come from projects in Texas including Bethel Wind Farm and Roseland Solar. A majority of the funds will go toward credit purchases and utility-bill payment costs, Google said, without elaborating on the remainder. For no charge across the United States, Nest users soon can automatically shift heating and cooling to times when energy is cleaner. New informational panels alongside search results show emissions …