From Just prove CO2, The Climate Challenge Excerpts: "On 12 November 2015, Dr. Peter L. Ward issued a Climate Challenge offering to give $10,000 from his children’s inheritance to the first person or team of people who can demonstrate through direct measurements in the laboratory and/or in the field that a 15% increase in carbon dioxide, such as that observed from 1970 to 1998, can actually cause more warming of Earth’s surface temperatures than caused by observed contemporaneous depletion of the ozone layer of up to 60%. The experiment must be reproducible. This challenge was sent by email to more than 2000 scientists who wrote or reviewed the 2013 IPCC Physical Basis Report and was issued to the media and on the web. No one has shown any serious interest." and, "The only direct experiments documented in the scientific literature were done by Knut Ångström in 1900, one in the Canary Islands and one in the laboratory. Both experiments showed that increasing CO2 concentrations had little effect on air temperature." ==================================== It has been nearly FOUR years since challenge was posted, has anyone taken the challenge to produce Direct measurements from Laboratory or in the Field to answer Dr. Wards detailed challenge??