Question

Explain three cause and effect relationships between the human activities and the measurable changes in the earth system represented in the understanding global change model

Answer 1

Answer:

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.

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Answer 2

By burning fossil fuels, tearing down forests, and raising animals, humans are progressively impacting the climate and the earth's temperature.

This adds massive volumes of greenhouse gases to the already existing ones in the atmosphere, amplifying the greenhouse effect and contributing to global warming.

The greenhouse effect is the primary cause of climate change. Some gases in the Earth's atmosphere function like greenhouse glass, trapping the sun's heat and preventing it from escaping into space, resulting in global warming.

Many of these greenhouse gases are naturally occurring, but human activity is increasing their quantities in the atmosphere, particularly:

• (carbon dioxide) 
• $CH_{4}$  ( methane ) 
• nitrous oxide
• gaseous fluorides

Carbon dioxide and nitrous oxide are produced when coal, oil, and gas are burned.

Destruction of forests (deforestation). By absorbing CO2 from the atmosphere, trees assist to control the climate. When trees are chopped down, the positive impact is gone, and the carbon contained in the trees is released into the atmosphere, so contributing to the greenhouse effect.

Increased livestock production. When cows and sheep digest their meal, they create a lot of methane.

Nitrous oxide emissions are produced by nitrogen fertilisers.

Fluorinated gases are released by fluorinated gas-using equipment and goods. These emissions have a warming impact that is up to 23 000 times stronger than CO2.