 Climate scientists say most of the increase is from greenhouse gases emitted by the burning of fossil fuels. Another factor is that the air over Atlantic shipping channels has become cleaner because of new marine regulations, and a masking effect from pollution particles has gotten smaller. Scientists say there's hope the record streak will end soon. A strong El Nino cycle, which tends to spike global temperatures, ended in June. I'm Jennifer King. Rita Foley reports on a gift intended to help medical students.