This gas is released by plants during photosynthesis.
What is oxygen (O₂)?
This tree is California’s state tree and can grow over 300 feet tall.
What is the coast redwood/giant sequoia?
This term describes the variety of life in a particular habitat or ecosystem.
What is biodiversity?
This national park is home to the world's tallest trees.
What is Redwood National Park?
This process decomposes organic waste into a nutrient-rich soil amendment.
What is composting?
This greenhouse gas is the most commonly emitted by human activities.
What is carbon dioxide (CO2)?
This extinct mammal is commemorated on California's state flag.
What is the California grizzly bear?
This drought-resistant ecosystem dominates much of coastal Southern California.
What is the chaparral?
This was the first national park established in the United States.
What is Yellowstone National Park?
This renewable energy source uses the force of moving water to generate electricity
What is hydroelectric energy?
This process occurs when excess nutrients in water cause algal blooms.
What is eutrophication?
This endangered California bird is the largest land bird in North America.
What is the California condor?
This biome, also called the boreal forest, covers most of northern Canada and Russia.
What is the taiga?
Half Dome and El Capitan are two iconic landmarks found in this national park.
What is Yosemite National Park?
These 17 interconnected objectives have been adopted by countries around the world to achieve a more eco-friendly future.
What are the United Nations Sustainable Development Goals?
The ozone layer is found in this layer of Earth’s atmosphere.
What is the stratosphere?
This is the only palm tree native to California.
What is the California fan palm (Washingtonia filifera)?
This type of species has a disproportionately large effect on its ecosystem relative to its abundance.
What is a keystone species?
This national park is the smallest in the U.S., containing only 91 acres.
What is Gateway Arch National Park?
This type of farming or gardening focuses on designing agricultural systems modeled after natural ecosystems.
What is permaculture?
This 1997 international agreement aimed to reduce greenhouse gas emissions.
What is the Kyoto Protocol?
This well-known yucca plant is incredibly slow-growing and has an average lifespan of around 150 years.
What is the Joshua tree (Yucca brevifolia)?
This process occurs when species compositions change in a biological community over time.
What is ecological succession?
This U.S. president officially established the National Park Service in 1916.
Who is Woodrow Wilson?
This economic model focuses on reusing materials, designing out waste, and keeping products in use as long as possible.
What is the circular economy?