Spatial, temporal, and demographic patterns in prevalence of smoking tobacco use and attributable disease burden in 204 countries and territories, 1990–2019: a systematic analysis... by Marissa B Reitsma (8674341)

“…Although prevalence of smoking had decreased significantly since 1990 among both males (27·5% [26·5–28·5] reduction) and females (37·7% [35·4–39·9] reduction) aged 15 years and older, population growth has led to a significant increase in the total number of smokers from 0·99 billion (0·98–1·00) in 1990. …”

Struvite Recovery from Anaerobically Digested Dairy Manure: A Review of Application Potential and Hindrances by Tao, Wendong

“…Continuous generation of large amounts of dairy manure plus increasing global interest in anaerobic digestion of dairy manure suggest a huge market for struvite production with anaerobically digested dairy manure. …”
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Quantified Database for Methane Dehydroaromatization Reaction by Nagat Elrefaei (21385544)

“…Another study added minor amounts of C₂H₄ and C₂H₆ to the feed which help reduce regeneration and increase the yield. …”