Writing › Summarize Written Text

Exercise 9

← Back to Summarize Written Text

Task reminder: Read the passage carefully, then write a one-sentence summary of 5–75 words. You have 10 minutes. Aim for 55–65 words using your own words.

1. Nuclear Fusion Energy

Nuclear fusion — the process that powers the Sun, in which light atomic nuclei combine to release enormous amounts of energy — has been pursued as an almost limitless clean energy source since the 1950s. Unlike nuclear fission, fusion produces no long-lived radioactive waste and uses abundant fuels derived from water. The central challenge has been achieving and sustaining the extreme temperatures and pressures needed for fusion — conditions far hotter than the Sun’s core — in a controlled environment. In 2022, the National Ignition Facility in California achieved a landmark “ignition” milestone, producing more energy from fusion than the laser energy used to trigger the reaction, reinvigorating global optimism about fusion’s commercial potential.


Model Summary

Nuclear fusion, which powers the Sun and produces no long-lived radioactive waste, has been pursued as a clean energy source since the 1950s, and a landmark 2022 ignition achievement in California — where fusion energy output exceeded laser input — has renewed confidence in its commercial potential.

2. The Psychology of Risk

Human beings are notoriously poor at assessing risk accurately, systematically overestimating the likelihood of dramatic, memorable events — such as plane crashes or terrorist attacks — while underestimating the risks of mundane but statistically more dangerous activities like driving or a sedentary lifestyle. Psychologists Daniel Kahneman and Amos Tversky identified this pattern as part of the “availability heuristic”: the tendency to judge the probability of an event by how easily examples come to mind. Media coverage exacerbates the phenomenon by disproportionately reporting exceptional events, making them cognitively available regardless of their actual frequency. The practical consequences include misallocated public investment in security and poorly calibrated personal health decisions.


Model Summary

Research in behavioural psychology shows that humans systematically misjudge risk by overestimating vivid, memorable threats and underestimating mundane ones due to the availability heuristic, a bias amplified by sensationalist media coverage with consequences for both public policy and individual decision-making.

3. Sustainable Urban Mobility

Cities around the world are grappling with the twin challenges of reducing transport-related carbon emissions and alleviating congestion that costs billions in lost productivity annually. Sustainable urban mobility strategies encompass a range of approaches: expanding and improving public transport networks, building cycling and pedestrian infrastructure, introducing congestion charging, electrifying vehicle fleets, and redesigning urban spaces to reduce the distances people must travel. Cities such as Amsterdam, Copenhagen, and Vienna demonstrate that high quality of life and low car dependency are mutually reinforcing rather than incompatible goals. Successful transitions, however, require sustained political will, equitable access to alternatives, and land-use planning that integrates housing, employment, and services.


Model Summary

Cities seeking to reduce transport emissions and congestion are adopting sustainable mobility strategies — including improved public transit, cycling infrastructure, and congestion pricing — and examples such as Amsterdam and Copenhagen show that reduced car dependency and high quality of life are achievable together, though success requires political commitment and equitable planning.