A student says: "The greenhouse effect is harmful, so it should be stopped completely."
Which is the best evaluation of this claim?
Incorrect, as without it the Earth would be much colder; the concern is its increase
Incorrect, as it is natural, and only gases from human activity absorb infrared radiation
Correct, as greenhouse gases absorb infrared radiation, so any amount causes harmful warming
Correct, as it is caused by the ozone hole letting more ultraviolet radiation reach the Earth
97 exam-style questions on Edexcel GCSE Chemistry 9.2 Earth and atmospheric science, covering 9.2.1 The Earth's early atmosphere, 9.2.2 How the atmosphere evolved, 9.2.3 Chemical test for oxygen, and 9.2.4 The greenhouse effect and climate change. Each one has a worked solution and a mark scheme showing where the marks go.