<section><h2>Week 3 test - Atmosphere and oceans</h2><p><p>This test focuses on the material covered in week 3 and aims to help you consolidate and evaluate your knowledge on the subject so far.</p></p></section><section><h2>Ozone depletion in the stratosphere due to CFCs will take approximately how long to recover?</h2></section><section><h3>Decreasing NOx observed over Europe from satellite was due to?</h3></section><section><h3>Which of the following are ocean colour sensors (select all that apply)?</h3></section><section><h3>Why do algal blooms cause anoxia?</h3></section><section><h3>Why is satellite data particularly useful for developing countries (select all that apply)?</h3></section><section></section><section></section>