This key facts covers Key Facts About Climate Change within Climate Change for GCSE Chemistry. Revise Climate Change in Atmosphere for GCSE Chemistry with 20 exam-style questions and 15 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 2 of 17 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 17
Practice
20 questions
Recall
15 flashcards
📊 Key Facts About Climate Change
- Global average temperature has risen by 1.1°C since pre-industrial times
- CO₂ levels have increased from 280 ppm to over 420 ppm since 1880 (50% increase)
- Weather = short-term conditions (hours/days); Climate = long-term averages (30+ years)
- Sea levels have risen 23 cm since 1880 due to thermal expansion and ice melt
- Arctic sea ice is declining by 13% per decade
- Main human cause: enhanced greenhouse effect from burning fossil fuels
- Fossil fuel burning accounts for ~75% of human CO₂ emissions
- Deforestation contributes ~11% of global CO₂ emissions