Environmental challenges

What is global warming?

• when temperature increases

• when temperature decreases

• when polar bears starve

• when lion fish invade a reef

A description of the environmental conditions averaged over many years is called ...

• The weather.

• The climate.

• Heat capacity.

• Global warming.

The greenhouse gas having the greatest role in human-caused global warming is ...

• Methane.

• Carbon dioxide.

• CFCs (chlorofluorocarbons).

• Ozone.

What is the greenhouse effect?

• warming of the earth due to gases in our atmosphere.
• cooling of the earth due to gases in our atmosphere

The following graph tells us what?

• Sea Levels are decreasing.
• Sea Levels are rising.

The main human activity that releases greenhouse gases is

• using bottled water
• burning fossil fuels
• texting on cellphones
• eating meat

What would the Earth be like without any greenhouse effect?

• frozen and lifeless

• extremely hot

• same as now

• slightly cooler than now

Why does the level of CO2 increase in the atmosphere?

• because of industry and vehicles

• because of increased infrared radiation

• because of increased ultraviolet radiation

• because of the extinction of species

Why is the increase of Greenhouse gasses a big issue?

• It causes climate change and increase in the global temerature 
• It can lead to a major increase in Greenhouses 
• It leads to more factories
• It causes a major decrease in people

Which are the 2 main sources of air pollution in urban areas?

• Vehicles

• Industries

• Volcanoes

• Agriculture