IELTS Writing Task 2 Quiz: All Clear & Simple?

In some countries, many people suffer from health problems due to eating too much fast food. It is, therefore, necessary for governments to impose a higher tax on this kind of food. Do you agree or disagree?

Global warming is one of the biggest threats humans face in the 21st Century, and sea levels continue to rise at alarming rates. What problems are associated with this, and what are some possible solutions? 

Some experts believe that it is better for children to begin learning a foreign language at primary schools rather than secondary schools.
Do the advantages of this outweigh the disadvantages?

A growing number of people feel that animals should not be exploited by people and that they should have the same rights as humans, while others argue that humans must employ animals to satisfy their various needs, including uses for food and research. Discuss both views and give your opinion.