(A) Between 1900 and current, the mineral use in the world has increased by factor of: 9, 20, 30, or 13? (B) Americans use __ times as much nickel as India: 100, 25, 10, or 50? (C) What is the proportion of world's people lived in cities in 2000? 52%, 46%, 30%, or 65%? (D) What % of USA forests is classified as commercial? 1/4, 2/3, 1/15, or 2/6? (E) Do birds, fish, amphibians or reptiles have the smallest # of extinct species?
Answer:
A. The correct answer is 13.
B. The correct answer is 10.
C. The correct answer is 46%.
D. The correct answer is 2/6.
(A) Between 1900 and current, the mineral use in the world has increased by factor of:...
We conducted a comprehensive literature search on drones in conservation up to October 2nd 2018, in line with related studies [10,11,35]. All searches were done by the same person in English, mainly using Google Scholar. This was further complemented through reference harvesting, citation tracking, abstracts in conference programs, and author search, using Research Gate and Mendeley (see PRISMA Flowchart in Supplementary Figure S1 Checklist and list of studies reviewed in Table S1). We then removed duplicate and unrelated results. Finally,...