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The greenhouse effect is a natural phenomenon but its effects have been enhanced by human activity over the past 200 years - Leaving Cert Chemistry - Question B - 2004
Question B
The greenhouse effect is a natural phenomenon but its effects have been enhanced by human activity over the past 200 years. (i) Explain the term greenhouse effect. ... show full transcript
Worked Solution & Example Answer:The greenhouse effect is a natural phenomenon but its effects have been enhanced by human activity over the past 200 years - Leaving Cert Chemistry - Question B - 2004
Step 1
Explain the term greenhouse effect.
Answer
The greenhouse effect refers to the process by which certain gases in the Earth's atmosphere trap heat from the sun. This phenomenon is essential for maintaining the Earth's temperature, as it allows sunlight to enter the atmosphere while preventing some of the heat from escaping back into space. The trapped heat helps to keep the planet warm enough to support life. However, human activities, such as burning fossil fuels and deforestation, have increased the concentration of these greenhouse gases, leading to enhanced greenhouse effect and global warming.
Step 2
Step 3
In relation to the gas you have identified in (ii), mention a type of human activity which has been a major contributor to the increased levels of this gas in the atmosphere.
Answer
Fossil fuel combustion, such as from power plants, vehicles, and industrial processes, is a major human activity that increases carbon dioxide levels in the atmosphere.
Step 4
Step 5
State three probable consequences of an increased greenhouse effect which have been suggested by environmental scientists.
Answer
- Rising global temperatures leading to more intense heatwaves and altered climate patterns.
- Melting polar ice caps which contribute to rising sea levels and potentially flooding coastal regions.
- Changes in ecosystems, such as shifts in species distributions, threatening biodiversity and leading to species extinction.