Man-Made
This is the human introduction of harmful materials into the environment
What is pollution?
A mother might take this of a sick child; but it is different from climate
What is temperature?
Less population and less density typically refers to this type of area
What is rural?
Most fish expel this substance through their gills; humans simply breathe it out
What is Carbon Dioxide (CO2)?
Using this C.C. helps you better express yourself, plus, the points don't hurt either
What is also?
This advancement took Humanity to new heights, but don't be confused -- the work is completely down to Earth
What is agriculture?
This transfer of energy from system to system is welcome in the colder months
What is heat?
Montréal is an example of this type of area
What is an urban area?
These paperwhite prehistoric "sheets" are quickly shrinking
What are ice sheets?
You'd better be careful to answer in the form of a question during Jeopardy, or else you'll miss out on the points from this C.C.
This undesirable condition surpassing the Earth's carrying capacity might have humanity looking to the stars for an answer
What is overpopulation?
This trapping of the sun's warmth might be welcome to a gardner; not so much to life on Earth
What is the Greenhouse Effect?
Fog, haze, smoke and other pollution in the atmosphere cause this undesirable effect
What is smog?
Some say the next wars will be fought over a different kind of liquid gold, made scarcer by these
What are droughts?
While playing Jeopardy, this C.C. will help you express yourself at the same time
What is meanwhile?
Decomposing plants and animals make up the ancient remains of this liquid gold
What are fossil fuels?
Often confused with weather, this refers to the weather conditions prevailing in an area in general or over a long period
What is climate?
Liquid gold -- fossil fuels are one type of this kind of energy
What is non-renewable energy?
This element of the atmosphere is quickly shrinking, due mainly to Humanity's emission of greenhouse gas
What is the stratosphere?
As a result of answering this 400 point question, this C.C. might just win you the game
What is therefore?
Between 1760-1840, this rapid transition of new technologies was seen as a tipping point for the global climate
What is the Industrial Revolution?
Often exaggerated as a consequence of climate change, droughts are one common example of this
What are extreme weather patterns (what is extreme weather?)
You won't see us running out any time soon, geothermal energy is a rarer source of this type of energy
What is renewable energy?
These vast expanses are often called Earth's "final frontier"
What are oceans?
You might be tempted to use simpler adverbs, but we know you're capable of using C.Cs like this one
What is however?