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#1
Q: What is the greenhouse effect?
A: Greenhouse gases trap heat from the Sun, warming Earth.
#2
Q: Main greenhouse gases?
A: CO₂, methane, nitrous oxide and water vapour.
#3
Q: What is biodiversity?
A: Variety of life on Earth — species, genetic and ecosystem diversity.
#4
Q: What is an ecosystem?
A: Community of organisms interacting with each other and their environment.
#5
Q: What is deforestation?
A: Large-scale forest removal causing habitat loss and CO₂ release.
#6
Q: What is the ozone layer?
A: Stratosphere region absorbing harmful UV radiation.
#7
Q: What is ocean acidification?
A: Seawater absorbing CO₂, lowering pH — harmful to coral.
#8
Q: What is renewable energy?
A: Energy from naturally replenishing sources — solar, wind, hydro.
#9
Q: What is the Paris Agreement?
A: 2015 treaty to limit warming to 1.5–2°C above pre-industrial levels.
#10
Q: What is permafrost?
A: Ground frozen for 2+ consecutive years in polar regions.
#11
Q: What is eutrophication?
A: Excess nutrients cause algal blooms that deplete water oxygen.
#12
Q: Fresh water percentage on Earth?
A: About 2.5%.
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