The value of many natural ecosystem services is most apparent as
A) we appreciate the damages and economic loss that result from the disruption of these ecosystems.
B) new technologies allow us to more fully exploit the natural capital of these ecosystems.
C) research into alternate energy resources continues.
D) new species are discovered and described by scientists.
Question 2
Rain with a pH of 4.6 is
A) about 10 times more basic than rain from non-polluted regions.
B) typical of regions with very low pollution.
C) about 10 times more acidic than rain from non-polluted regions.
D) about 100 times more acidic than rain from non-polluted regions.
Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an
A controlled fire being set as part of ecosystem management in Jasper National Park.
When a Tornado Strikes: Social Organization Following a Natural Disaster
Selected Natural Products
Structural similarities between antimetabolites and their natural counterparts.
Natural Resource Prices, 1850–2010