hope, a feeling that something good will happen in the future., fear, a strong feeling when you think something bad may happen., decade, a period of ten years., company, a business organisation where people work to produce things or provide services., eco-friendly electricity, electricity produced in a way that does not harm the environment., fumes, strong, often harmful gases or smoke in the air., air pollution, dirty or harmful substances in the air., smog, dirty fog in cities caused by smoke and pollution., colonise, to move to a new place and start living there as a group of people., moon, the natural object that moves around the Earth and shines at night., population, all the people living in a particular place., rise, go up., billion, the number 1,000,000,000., extinct, when a type of animal or plant no longer exists., temperature, how hot or cold something is., extreme weather conditions, very unusual and dangerous weather, such as storms or heatwaves., tsunami, a very large and powerful sea wave usually caused by an earthquake., hurricane, a very strong storm with powerful winds and heavy rain., communicate, to share information, ideas, or feelings with others., traffic lights, lights on the road that control when cars stop and go., interact , to communicate or work together with other people or things., prevent, to stop something bad from happening., discover, to find something for the first time., to treat a disease, to give medical care to make an illness better., run on, when a machine works using a particular type of energy (for example, electricity or solar power)., fight, to try very hard to stop something bad or to win against something..

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