Population
This is the current global population
What is 7.7 billion people?
This country uses the most resources per person.
What is the United States of America?
Air pollution is mostly caused by burning these
What are fossil fuels?
These gases trap heat in the atmosphere
What are greenhouse gases?
This technology filters the exhaust coming out of cars
What is a muffler?
This safety technology kills bacteria in water and prevents diseases.
What is chlorine/ chlorination?
This type of resource cannot be replenished as fast as we use it.
What is a non-renewable resource?
Precipitation with a pH of over 7 that results from burning fossil fuels
What is acid rain?
CO2 is a greenhouse gas that is emitted when humans do this
Burn fossil fuels
This technology can replace fossil fuels with sun energy
What is solar panels?
This cure for viral infections caused the population to increase
What are vaccines?
These renewable energy machines turn wind into electricity
What are wind turbines?
Respiratory disease is caused by this component of smog
What is NO2?
Increasing temperatures have been linked to increases in this greenhouse gas
What is CO2
This technology can replace fossil fuels with dams on rivers
What is hydroelectricity?
This cure for bacterial infections caused the population to increase
What are antibiotics?
We will run out of fossil fuels in this many years.
What is about 50 years?
Burning fossil fuels causes these two gasses to increase in the atmosphere
What is CO2 and NO2? (carbon dioxide and nitrogen dioxide)
Warming oceans mean more of these deadly weather events
What are hurricanes? (typhoons/ cyclones)
This technology can replace fossil fuels with wind energy.
What are wind turbines?
This method for fixing nitrogen into fertilizer caused the population to exceed its earlier carrying capacity
What is the Haber-Bosch process
Fossil fuels are the remains of animals and plants that died this many years ago.
What is 300-350 million years ago?
This greenhouse gas will be released into the air as the ice caps melt
What is methane (CH4)?
A warming planet means some areas actually get colder because of this
What is the polar vortex
These organisms suck carbon dioxide out of the air.
What are plants?