Abstract Background California in the year 2020 experienced a record breaking number of large fires. Here, we place this and other recent years historical context by examining records fire events state back to 1860. Since drought is commonly associated with events, investigated relationship droughts over 160 period. Results This study shows that extreme such as seen are not unknown historically...

Abstract The understanding of centennial trends extreme temperature has been impeded due to the lack early-year observations. In this paper, we collect and digitize daily data set Northeast China Yingkou meteorological station since 1904. After quality control homogenization, analyze changes mean in past 114 years. results show that (Tmean), maximum (Tmax), minimum (Tmin) all have increasing du...

At the International Nickel Company (INCO) nickel refinery in Clydach, Wales, U.K., which has operated since 1901, 365 respiratory cancers, including 85 nasal cancers and 280 lung cancers, have occurred in workers since the 1920s. From 1901 to 1923, incidences of these cancers were high. In 1923, the refining process was changed, eliminating a nickel arsenide, Ni5As2, called orcelite, from the ...

General purpose technologies (GPTs) are credited with generating the increasing returns that drive endogenous growth. For example, Paul David (1991) explains the surge in U.S. productivity during the 1920’s as a delayed response to the introduction of the electric dynamo in the 1880’s. To the extent that GPTs yield large positive externalities on a wide range of industries some time after they ...

Based on the data of global mineral production and ore recovery in mining processing, this paper presents annual 25 minerals calculates losses 20 from year 1920 to 2018. The results indicate that 23 has increased by between 1 930 times since 1920, similar increase GDP per capita 1960. At same time, a vast amount been lost processing 1920. Hence, discusses possibility increasing ratio.