On planet Earth, three things are rising:
- The human population: increased life expectancies, more children and improved healthcare are causing people to live longer.
- The temperature: over every decade since 1880, the Earth's temperature has risen by 0.14° F / 0.08° C, which is making it harder to grow certain crops and maintain livestock in certain areas.
- Sea levels: as a result of this change in temperature, arctic ice which has been frozen for thousands of years is melting, endangering land below sea level.
These three combined mean there is less space to grow food and more people who need to eat.