Earth Matters

What is a gas produced natuarlly in the upper atmosphere?

• Ozone

• Air

• Carbon dioxide

• Hydrocarbons

................... reduces the amout of oxygen that can be carried by the blood.

What cause acid rain and smog

• Warm weather

• Natural gas

• Gases

• Nitrous oxides

Which of the following is a renewable resource?

• oil

• iron ore

• Trees

• Coal

Where population come from?

• Motor vehicles

• Planting trées

• recycle

• Rain

Which countribute to acid rain?

• O2

• CO2

• SO2

• NO2

Which are released when fuel is not completely burned?

• N2

• Ma2

• Hydrocarbons

• Au

which gases form smog???

• O2

• CO2

• VOCs

• SO3

Percentage of greenhouse gas emissions from car worldwide

• 20%

• 15%

• 50%

• 100%

Which human activity is the leading cause of increased carbon dioxides in the atmosphere?

• Agriculture

• Transportation

• Deforestation

• Fossil fuel combustion