## Introduction

In this first section we look at some facts.
There are 9 billion people on the planet and by 2050 that number will have risen to 11 billion. On the one hand, this begs the question; how can our planet feed everyone?
On the other hand, we all know we throw food away.
So, what can be done to solve this problem?

This first section contains 5 steps. Work them through step by step.

Step | Activity |
|  | Introduction | Find out what you already know.
Step 1 |  | Speaking | Describe the pictures. Read a text about throwing away food. What is your reaction to the information?
Step 2 |  | Reading | Answer questions about food waste. Read a text and do the exercise.
Step 3 |  | Words | Match words with the definition. Complete sentences with the words.
Step 4 |  | Grammar | About the passive, tenses and modal verbs. Rewrite sentences in passive form.
Step 5 |  | Task | Write a letter of enquiry. You like to be a volunteer at The Harvest company.
|  | Evaluation | Reflecting on what you have learned.

| Difficult words? Search these on Cambridge Dictionaries