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1. The following human activities emit greenhouse gases into the atmosphere:

Burning of fossil fuels






2. The greenhouse gases emitted are made up of the following:

Carbon Dioxide


Nitrous Oxide

Fluorinated Gases


3. The sun radiates energy, in the form of lightwaves, that passes through the atmosphere and is absorbed by the earth, warming it. Some of this energy is radiated back into space by the earth in the form of infrared waves, some of which gets trapped by the earth's atmosphere, warming it some more (this is normal). However, as the concentration of greenhouse gases in the atmosphere increases, an excess amount of outgoing infrared radiation gets trapped, warming the earth even more (above normal).


Therefore, the more greenhouse gases emitted = the more outgoing infrared radiation trapped = the warmer the earth.

* 2018 was the 42nd consecutive year with a global temperature above the 20th century average.

* 17 of the 18 warmest years have occurred since 2000.

* The last 5 years were the hottest years on record (in order: 2016, 2015, 2017, 2018, 2014).


When the earth gets warmer, the following result:

Glaciers melt more rapidly.

Sea levels rise.

Coastal areas are threatened.

More floods.

Ocean acidification.

Coral bleaching.

Loss of marine life.

Stronger and more frequent hurricanes/cyclones/typhoons.

More extreme weather events.

Loss of animal and plant species.

Longer and more frequent heat waves.

More droughts.

More wildfires.

More insect-borne diseases.

More health problems.

Food shortages.

Water scarcity.

Climate refugees.

Political and social instability.