In China there are 118 boys for every 100 girls born, compared with a natural ratio of 105 to 100.
But since the advent of genetic engineering in the 1970s, scientists have learned that artificial organisms designed for laboratory use are less well-suited for survival in the natural environment compared with naturally occurring organisms.
In addition, for the same initial geometrical configuration of natural fractures, hydraulic fracturing often leads to more complex fracture network in formations containing frictional natural fractures compared with formations containing cemented natural fractures.
Since 1950, producers have extracted about $117 billion in natural gas compared with $87 billion in oil.In 2000, sales of natural gas exceeded oil for the first time.
While experimental stems without herbivores had more mass than natural stems of the same herbivore treatment, herbivory caused reductions in mass of ∼41 % for experimental and natural stems, compared with their respective uneaten stems (Fig. 2B; F3, 147 = 27.6, P < 0.001).
Last year, 10.7 million more people worldwide were affected by natural disasters compared with 2013, while conflict and persecution created a record number of displaced people.
Shale beds now produce more than a quarter of America's natural gas, compared with just 1% in 2000.
In an interview with Evan Davis on BBC2's Newsnight to promote his latest book, Wilson was asked about his differing view of natural selection compared with that of Dawkins.
While there are environmental and economic benefits to natural gas compared with other fossil fuels, its widespread popularity as an energy source is relatively new.
