Which of the following best describes what led to london’s “killer fog” in 1952?
a)
pollution from the air contaminated the water supply which is what killed people.
b)
unprecedented high pollution from factories occured and killed thousands.
c)
poor city design led to faulty ventilation in houses.
d)
soot from forest and wildfires in the surrounding areas blew over the city.
e)
millions of coal fires and stagnant air caused toxic fumes to build up in the air.

Populations of blue-winged warblers, a type of bird, migrate south in the winter and return to canadian breeding grounds in the spring. as global temperatures have increased due to climate change, spring has started arriving in the warbler's breeding grounds earlier in the year, before the warblers return. warblers now arrive at their breeding grounds too late to select ideal nesting sites and to feed on important early-spring food sources how are populations of blue-winged warblers most likely to be affected by the earlier arrival of spring? o a. populations will go extinct since the warblers will stop migrating to breeding grounds. b. populations will be unaffected since most species can quickly adapt to effects of climate change. c. populations will increase since warmer temperatures are generally beneficial to survival, d. populations will decline since individuals will be less likely to successfully reproduce, reset next

State officials are considering constructing a road through a forested wilderness area. this action will likely affect the forest ecosystem in various ways. part a: predict how the construction of a road could negatively affect plants and animals in that ecosystem. (3 points) part b: describe one way that the construction of a road could have a positive impact of the forest ecosystem. (1 point)

What organ systems are working to you cool down after a workout?