How much of the world’s oxygen is produced by just the Amazon rainforest?
5%
10%
20%
1%
How much oxygen does an average 50-year-old tree provide?
Enough for 4 people a year
Enough for 8 people a year
Enough for 10 people a year
Enough for 1 person a year
Which land-based ecosystem holds the most concentration of plants and animals, i.e. biodiversity?
Tropical forests
Coral reefs
African savannah
South Pacific islands
How many people in the world are dependent on fish as their main source of daily protein?
2 out of every 10 people
1 out of every 10 people
3 out of every 10 people
8 out of every 10 people
What uses the most energy in U.S. homes each year?
Heating and air-conditioning
Lighting
Refigeration
Heating water
Which of these species are threatened by global warming?
Arctic fox
All of the above
Clownfish
Koala
When was the first Earth Day?
1970
1999
1982
2003
In the average home, which of the following uses the most water?
Washing a load of clothes
Taking a 10-minute shower
Filling the bathtub
Flushing the toilet
Which of the following takes the longest time to break down or disintegrate?
Aluminum can
Disposable diaper
Plastic 6-pack holder
Hard plastic container
