Scientists in England say 1999 will almost certainly be the warmest year ever recorded in the U.K., topping the previous high recorded in 1990 by about a tenth of a degree Celsius. Worldwide, 1999 is on track to be one of the 10 hottest years ever, but not nearly as warm as the blistering years 1998, 1997, or 1990, according to info from the Goddard Institute for Space Studies, based in the U.S. In other climate news, a report by the National Research Council and its Chinese counterparts yesterday recommended more collaboration between the U.S. and China on developing cleaner energy technology to reduce greenhouse gas emissions.