Is this cause for celebration? It is World Population Day. Experts are divided on whether we need more or fewer people on Earth.
Earth population may be ‘billions bigger’
Peak people?: The world's population expanded rapidly in the second half of the 20th Century — and may actually be larger than we think. Glossary
Population - All of the people that live in a place.
United Nations - An international organisation focused on keeping peace. Its refugee agency, the UNHCR, aims to assist refugees around the world.
Taxes - There are three main ways for governments to obtain money: print it, borrow it or collect taxes.
Climate change - Long-term shifts in temperatures and weather patterns. Human action is a major cause of climate change.
Habitats - An animal’s habitat is the place that they live in.
Resources - A stock or supply of things, such as money or food, that can be used to fulfil a purpose. Earth's natural resources include air, water, soil, minerals, fuels, plants, and animals.
Pollution - When harmful or dangerous things are put into the environment.