Global warming may ... a.Influence the length of seasons. b.Cause coastal flooding. c.Lead to more frequent and severe storms. d.All of the above

You burn more calories ... A. sleeping B.watching TV

Which is FALSE? a. trees breath in carbondioxide and emit oxygen b. cold winter means that the planet isn’t warming anymore c. the world population is over 7.6 billion

Which country is the #1 trash-producing country in the world at 1,609 pounds per person per year. A. Turkey B. USA C. China D. Russia

How much of the world's water is available for human use? a.75% b.35% c.15% d.Less than 1%

Petroleum, coal and natural gas are all ... a.Environmentally friendly b.Non-polluting c.Renewable d.Fossil fuels

The layer of protective gases that shields the earth from harmful radiation. It is the second layer of the earth’s stratosphere that protects us from the sun’s ultraviolet radiation.

Global warming is caused ... a.Only by human activity. b.Only by natural factors. c.Mainly by natural factors. d.Both by human and natural factors

Which country currently emits the most greenhouse gases? a.Russia b.China c.The USA d.Germany

Greenhouse gases are needed to keep the Earth warm enough to support life but ... is the main source of excess greenhouse gases in the atmosphere. a.Deforestation b.Factory farming c.Human use of fossil fuels d.Population

How long does it take for glass to decompose? a.100 years b.About 500 years c.1000 years d.One million years

Rainforests once covered 14% of the earth's land surface; now they cover .... a.6% b.8% c.10% d.12%